Amateur Radio Boat Antennas in Fresh Water

We explore the differences from operating over salt water

by Bob Larkin, W7PUA

Introduction - Amateur radio stations have been used on boats for more than a hundred years. Water can be a better antenna location than land, and particularly so for highly conductive salt water. There is an issue of connecting between the radio ground and the water itself. In the case of salt water, it is usually adequate to have a small metal plate in contact with the water. Fresh water is a different situation, since if pure enough, is a non-conductor of electricity. See [Note 1] for discussion fo HF boat antennas.

Scamp Sailboat — Figure 1 - "Wave Guide" was part of our boat family through 2023. She was built with a ground metal from stem to stern. This was not solid coverage of the bottom but had copper tape extending into as many areas as possible. Using the VHF feedline running up the mast as a loaded vertical radiator gave good antenna performance on 75-meters and higher frequencies in both fresh and salt water.

I have operated W7PUA from several different boats, all of which had an extensive ground system. The antennas have been used at a variety of frequencies in the HF spectrum, but the more challenging, technically, are the lower frequencies, such as 75-meters. The antenna has always consisted of a vertical conductor of 14 to 20 ft length with a loading coil as far above the bottom as can be reached. This has always worked well enough, even in fresh water, to not be given much thought to how it all works. But, then, in the summer of 2023, we acquired a 22-ft C-Dory which has limited opportunity to build a ground system into the bottom. Much of the bottom is covered with plastic foam filler. I first tried a ground on the middle 7-ft of the floor, that was accessible. It had a layer of fiberglass between the ground tape and the water and was limited in size to about 2 x 6 feet. The tape was not solid at all, but the behavior of RF fields makes this less important. The receiving performance was adequate, but nobody could hear the transmitter at lower frequencies like 75-meters!

On to getting a ground system that works - There is a lot of wiring in the boat, including ground wires. In addition, the outboard motors have aluminum frames that are in the water. Importantly, there are two stainless steel 9 x 12 inch trim tabs. These are under water and are protected against DC current galvanic erosion by protective anodes bolted under the plates. All metal surfaces are bonded together by heavy wires when the boat is built. So, I fastened a #12 stranded wire to the closest trim tab using the extension of the bolt holding the anode. This is referred to as the "boat ground" in the following discussion.

The boat ground seemed to work and then not. It was later found that there was sometimes arcing in the mount for the loading coil that invalidated some of the antenna measurements. But, even before the arcing it did not seem to be transmitting well when the boat was in fresh water. This raised a question of how a ground system really works in fresh water and what is needed to make it transmit with reasonable efficiency. The strange behaviour due to the unknown arcing, at higher power, made the fresh water antenna seem more complex and inspired further investigation, that turned out to be an interesting and useful endeavour.

It seemed to be time to be more analytical about our antenna. What does water look like to our RF waves? A quick reading of the literature tells us that pure non-ionized water is an insulator since without added ions, there is no separation of the molecules and therefore no movement of ions or electrons. Additionally, water has a very high dielectric constant of about 78. This is the result of the H2O molecule being electrically asymmetrical with the ability to align the molecules to an applied electric field. Most plastics have dielectric constants in the 2 to 5 range, so 78 suggests quite a different kind of material. Remember that this dielectric constant means that if we build a parallel plate 100 pF capacitor in air it will show a capacity of 7800 pf when placed in water.

This is a fine bit of knowledge, but water never comes non-ionized. It comes with a variety of non-water materials, with an extreme being the salt water of the oceans. So, I gathered some Bi-Mart distilled water, some Fern Ridge fresh water, some Toledo Oregon part-Ocean water and also created some saturated salt water by adding table salt to some Bi-Mart water. This was then measured with an RF network analyzer over a frequency range of 1 to 30 MHz. The details of the measurement is in Appendix A, below. The results are summarized in Figures 2 and 3.

Water Resistivity — Figure 2 - This is volume resistivity as derived from network analyzer measurements. This is the resistance that would be seen between two 1-meter square metal plates, spaced a meter apart with the volume between the plates filled with the indicated type of water.

Water Dielectric — Figure 3 - This is dielectric constant as derived from network analyzer data. No curve is shown for the Toledo water nor for the saturated salt water, as the resistance effectively shorts out the capacitance enough to make measurements out of our range. See Appendix A for details of the measurements.

On land we put out radial wires for ground systems. On a boat this is impractical. The high dielectric constant of water, as seen in Figure 3, suggested we could treat the ground system as a big capacitor, and bigger was better. In addition any part of our ground system inside the boat had a fiberglass capacitor in series with it. So when I found a roll of bronze screen 2-ft wide and 8-ft long it looked like one side of a capacitor. This was arranged to be dropped into the water next to the boat with about half of the screen on the bottom. Appendix B has more information on the screen ground.

Initial measurements at 75-m were encouraging. The loading coil needed to be around 50 uH and the resonance was reasonably sharp. The feed point, 3-ft above the water, was around 40-Ohms. This suggested reasonable losses due to the ground system and the loading coil. Most importantly, the 100-Watt radio was able to talk to other stations! A side benefit was that tuning was not affected by the rocking of the boat.

C-Dory and Ground Screen — Figure 4 - The C-Dory "Airwave" at the dock with the ground screen. The vertical antenna is on the transom of the boat and barely visible in this picture. Sitting on the dock is the normally submerged bronze ground screen. This ground screen rolls up on the PVC pipe at the screen left edge. The smaller vertical antenna mounted to the top rail is for VHF.

Performance measured by WSPR - . Receiving HF signals on a boat usually works well when not in a marina and when motors and the electronics are shut down. The flat water brings in signals well, especially at lower angles of radiation. Transmitting HF signals can be a different story. Short (compared to a quarter wavelength) verticals have several loss elements that reduce the radiation efficiency. Loading coil losses are part of this, but the big one is power lost between the radio ground and the Earth ground. Thus, the performance evaluation is best done by having the the boat transmitting and shore stations receiving. One fine way to do this is to transmit a WSPR signal and gather reception reports from the internet. The receiving stations report signal-to-noise ratio in dB and so we can change the transmitting antenna and find out how the signal has changed. This assumes that the receiving noise is not changing which is often a valid assumption.

So, W7GLF, W7SZ and W7CQ helped out by putting on 80-meter WSPR receivers in the daytime range of the boat and there were several more that were running receivers already. With the boat in fresh water at Fern Ridge Reservoir, I transmitted for 4 or 5 2-minute transmissions using the screen ground and then would switch to the boat ground via the trim tab and transmit some more. This was done during the day and also at night. At night time there were more reports due to the lack of D-layer absorption in the ionosphere.

The reports can be easily downloaded from this web site. If one specifies our own transmitting call, all receptions can be acquired at once. I copied the results and pasted them into a spread sheet (see Appendix C). Sorting on the reporter call sign gives a picture of which receiving stations produced full, or nearly full, report sets. An a priori list of stations was put together, meaning that the stations included in the study were chosen without looking at the S/N values. For each of the selected stations I then averaged the dB S/N for both ground systems separately and took the difference. Averaging of dB's is not the same as averaging powers, but is simpler and probably a valid measure when the difference are not too great.

Not being sure if there could be distance related results, the S/N differences were plotted against the distance to the reporting station, as shown in Figure 5. Looking at the results showed that there were times when either of the two ground systems produced the strongest signals. But, looking across both the day and night-time results, a clear preference for the ground screen is seen. The exact value is not important, but to the eye it is 2 or 3 dB.

What does not show in the WSPR data is that when using the boat ground system in fresh water, the tuning of the antenna is effected by motion of the boat. Walking from the port to starboard side can change the tuning by 10's of kHz at 75-meters. This is not seen in salt water and not seen with the ground screen. In addition, when receiving, electronics generated noises are noticeably stronger when using the boat ground.

So I conclude that either the boat ground system or the screen ground is usable in fresh water, but if it is practical to put down the ground screen, it is preferred.

Thank you to the 8:30 Guys and to W7XV and the folks at the Great Northern Boaters Net for helpful discussions and signal reports.

Notes:

http://www.accidentalcruiser.com/features/Installing%20HF%20Radio.html is a good general discussion about getting HF radios to work on boats.
Reference Data for Radio Engineers, 4th Edition, 1956 by International Telephone and Telegraph. This edition has the formulas for capacity on page 554. For other editions, look for "Transmission Lines, Fundamental quantities and parameters."
Dielectric Constant information is available from https://www.britannica.com/science/dielectric-constant
A good write up that in cludes Volume Resistivity is https://atlas-scientific.com/blog/resistivity-of-water/

Back to W7PUA Home Page

Corrected missing Figure 5 - 2 August 2024

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APPENDIX A - Measuring the waters - An important part of coming up with an effective ground system is to characterise real water with some measurements. After a false start or two, I found that my collection of electronic stuff included a General Radio 10cm Open Circuit.

General Radio 874-Series 10 cm open. — General Radio 874-Series open circuit with BNC adaptor.

This is a piece of stainless steel precision 50 Ohm coaxial line that is supported only at the connector end. The inner conductor diameter is 0.244-inches and the outer conductor diameter is 0.562-inches. It can be dipped into a glass of test water to a known depth (the red tape) and the dielectric at that point is only the water. Also, by being physically open, it can be completely washed and rinsed with distilled water between measurement samples. It is attached to an HP8714 network analyser using a short length of RG-58 coax and BNC connectors. The coax is all calibrated out making the measurement plane the last BNC connector. At frequencies in the 1 to 30 MHz range, the test fixture ends up easily being removed from the measurement by calibration, leaving only the part of the line with water.

The "pure" water that was readily available was Bi-Mart's gallon jugs of Distilled Water. These are not processed to be "ion-free" but gave results close to that expected for pure H2O. The Smith chart from the network analyzer is for the distilled water.

For instance, at 4 MHz, the 62-mm line with water measure an impedance of 0.96 Ohms in series with a capacitive reactance of 115 Ohms. This translates to a 346 pF capacity with a Q of 120.

Next I added table salt until it was saturated with a few grains still lying on the bottom. At 4 MHz, this measure 0.61 Ohm in series with some very small reactance, too small to measure. This translates to just a resistor of 0.61 Ohms. This serves as a reference point for extreme salt water. Lake water was taken from Fern Ridge Reservoir and water from the Yaquina River at Toledo, Oregon completed the range of water that the boat should encounter.

A couple of words on the calculations. A common set of parameters describing a bulk dielectric material, including water, is Dielectric Constant and Volume Resistivity (see notes 3 and 4). For our experiments, the Dielectric Constant is found by calculating the capacity of the part of the measurement line that will be placed into the water. Knowing that we have an air supported 50-Ohm transmission line allows us to calculate the capacity of our 62 mm line as [Note 2] 3333*(62/(50*1000))=4.13 pF plus fringing capacity of about 0.15 pF. This means, in air, we have 4.3 pF. The network analyzer shows the capacitive reactance with distilled water to be 115 Ohms. This translates to a 346 pF capacity from which we can calculate the Dielectric Constant as 346/4.3 = 80.5.

The Volume Resistivity is found by translating the network analyzer series impedance into an equivalent parallel resistor and capacitor using complex number division. Our distilled water ends up being a 346 pF capacitor in parallel with Rp, a 13.7K Ohm resistor. This resistance can be thought of as many thin sleeve resistors in series between the inner conductor and the outer conductor. We let these sleeves go to zero thickness by integration and get a formula, that includes our particular test cell geometry, VR = 0.4667 * Rp. For the distilled water at 4 MHz, this is 6400 Ohm-meter.

APPENDIX B - Ground screens - Several systems of getting a capacitve connection through the fresh water were tried. One option that I had was an 8-ft roll of bronze door screen, 2-ft wide. This was left over from grounding screens for the wooden boats mentioned in the introduction. I soldered copper tape across one end and bolted that end to a polycarbonate bar, cut to 2-ft. A # 12 stranded wire was also soldered on at the middle of the tape. The other end was bolted to a PVC pipe, suitable for rolling the screen up when not being used. The regular Fern Ridge marina slip for the boat has about 7-ft of water depth. This puts about half of the screen on the lake bottom and half coming up. The stranded wire connection point is several feet below the surface.

Modelling the ground system could be very useful. This might be worked with some version of the NEC antenna program. The screen could be looked upon, very roughly, as a parallel plate capacitor 0.6 by 2.4 meters in sized spaced away from the "actual" ground. Just how to include the spreading of the field lines as they go down and what spacings to use are all questions. To get an order of magnitude, if there was no spreading of the field lines and a perfect ground was one meter away, the capacity would be 8.854*78*0.6*2.4 or about 1000 pF. This would have a reactance at 3.8 MHz of about 42 Ohms. The shunt resistance in lake water would be, from figure 2 above, about 200/(0.6 * 2.4) or about 140 Ohms. That value, in parallel with the 42 Ohm reactance would be one major cause of power loss.

Another model would be to make the screen a transmission line. That starts to make sense when you take into account the slowing of RF waves in water. They travel at 1/sqrt(78) or about 11% the speed that occurs in air. Our 8-ft screen is now acting like it is 70 feet long. This all seems interesting, but needs further investigation before conclusions can be drawn.

The screen I used was of a fine mesh that would keep a flying insect on the correct side. We know that this would work well for RF purposes with larger mesh holes. I do not know how far this can go before the efffective capacity diminishes. The previous home-built boats had many places where it was a foot or so between pieces of copper tape. At 3.8 MHz this is still a small part of a wave length. The electric field lines tend to bend to arrive at the metal, rather than going through and maybe returning outside. Hardware cloth is available in a variety of mesh sizes and guages. It might be useful in putting together a ground system.

APPENDIX C - WSPR Reports

NIGHT  3570 kHz     WSPR    BOAT GROUND
   Date         Time   Transmit S/N    Receive  Grid    Dist km Brg   Ground
2024-Jul-12     4:36    W7PUA/M -1      W7CQ    CN83jx  11      144     Boat
2024-Jul-12     4:36    W7PUA/M -15     N7KJW   DM34sl  1414    135     Boat
2024-Jul-12     4:36    W7PUA/M -8      K7NOJ   CN85so  184     21      Boat
2024-Jul-12     4:36    W7PUA/M -9      N1SRC   DN23ai  594     95      Boat
2024-Jul-12     4:36    W7PUA/M -16     W0AY    DN26    699     65      Boat
2024-Jul-12     4:36    W7PUA/M -4      W7SZ    CN85    159     7       Boat
2024-Jul-12     4:36    W7PUA/M -25     N7VVX   DN40bw  997     106     Boat
2024-Jul-12     4:36    W7PUA/M -16     KFS/K   CM87tj  745     174     Boat
2024-Jul-12     4:36    W7PUA/M -9      KPH     CM88mc  663     177     Boat
2024-Jul-12     4:36    W7PUA/M -27     KF6ZEO  CM87sr  708     174     Boat
2024-Jul-12     4:36    W7PUA/M -16     KFS/OMN CM87tj  745     174     Boat
2024-Jul-12     4:36    W7PUA/M -17     K6PZB   CM88nk  626     177     Boat
2024-Jul-12     4:36    W7PUA/M -23     N6GN/K  DN70jo  1532    98      Boat
2024-Jul-12     4:36    W7PUA/M -2      N4RVE   CN88kn  501     1       Boat
2024-Jul-12     4:36    W7PUA/M -18     KFS/SW  CM87tj  745     174     Boat
2024-Jul-12     4:36    W7PUA/M -7      KB7GF   DN06ta  443     59      Boat
2024-Jul-12     4:36    W7PUA/M -17     KJ6MKIQ CM88oi  636     176     Boat
2024-Jul-12     4:36    W7PUA/M -14     KA7OEIQ DN31uo  937     103     Boat
2024-Jul-12     4:36    W7PUA/M -17     KA&OEI9 DN40ao  1007    109     Boat
2024-Jul-12     4:36    W7PUA/M -22     N6GN2   DN70ll  1550    99      Boat
2024-Jul-12     4:36    W7PUA/M -3      W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     4:36    W7PUA/M -9      ND7M    DM16xf  1066    142     Boat
2024-Jul-12     4:36    W7PUA/M -26     KA9Q    DM12ju  1353    155     Boat
2024-Jul-12     4:36    W7PUA/M -14     WB7ABP/ CM88ok  627     176     Boat
2024-Jul-12     4:36    W7PUA/M -13     KA7OEI1 DN31uo  937     103     Boat
2024-Jul-12     4:36    W7PUA/M -18     KP4MD   CM98iq  620     164     Boat
2024-Jul-12     4:36    W7PUA/M -13     W7PUA   CN84jq  70      5       Boat
2024-Jul-12     4:36    W7PUA/M -16     KFS     CM87tj  745     174     Boat
2024-Jul-12     4:34    W7PUA/M -15     N7KJW   DM34sl  1414    135     Boat
2024-Jul-12     4:34    W7PUA/M 0       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     4:34    W7PUA/M -5      W7GLF   CN87vr  416     11      Boat
2024-Jul-12     4:34    W7PUA/M -2      W7SZ    CN85    159     7       Boat
2024-Jul-12     4:34    W7PUA/M -25     N7VVX   DN40bw  997     106     Boat
2024-Jul-12     4:34    W7PUA/M -9      KPH     CM88mc  663     177     Boat
2024-Jul-12     4:34    W7PUA/M -2      N4RVE   CN88kn  501     1       Boat
2024-Jul-12     4:34    W7PUA/M -19     KFS/SW  CM87tj  745     174     Boat
2024-Jul-12     4:34    W7PUA/M -14     KFS/K   CM87tj  745     174     Boat
2024-Jul-12     4:34    W7PUA/M -14     KFS/OMN CM87tj  745     174     Boat
2024-Jul-12     4:34    W7PUA/M -17     W7PUA   CN84jq  70      5       Boat
2024-Jul-12     4:34    W7PUA/M -18     KJ6MKIQ CM88oi  636     176     Boat
2024-Jul-12     4:34    W7PUA/M -16     K6PZB   CM88nk  626     177     Boat
2024-Jul-12     4:34    W7PUA/M -13     KA7OEIQ DN31uo  937     103     Boat
2024-Jul-12     4:34    W7PUA/M -17     KA&OEI9 DN40ao  1007    109     Boat
2024-Jul-12     4:34    W7PUA/M -22     KA9Q    DM12ju  1353    155     Boat
2024-Jul-12     4:34    W7PUA/M -6      KB7GF   DN06ta  443     59      Boat
2024-Jul-12     4:34    W7PUA/M -11     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     4:34    W7PUA/M -21     N6GN2   DN70ll  1550    99      Boat
2024-Jul-12     4:34    W7PUA/M -14     KA7OEI1 DN31uo  937     103     Boat
2024-Jul-12     4:34    W7PUA/M -13     WB7ABP/ CM88ok  627     176     Boat
2024-Jul-12     4:34    W7PUA/M -18     KP4MD   CM98iq  620     164     Boat
2024-Jul-12     4:34    W7PUA/M -4      W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     4:34    W7PUA/M -14     KFS     CM87tj  745     174     Boat
2024-Jul-12     4:28    W7PUA/M -14     N7KJW   DM34sl  1414    135     Boat
2024-Jul-12     4:28    W7PUA/M -17     W0AY    DN26    699     65      Boat
2024-Jul-12     4:28    W7PUA/M -2      W7CQ    CN83jx  11      144     Boat
2024-Jul-12     4:28    W7PUA/M -34     N7VVX   DN40bw  997     106     Boat
2024-Jul-12     4:28    W7PUA/M -20     KC7PBF  CN85    159     7       Boat
2024-Jul-12     4:28    W7PUA/M -8      KPH     CM88mc  663     177     Boat
2024-Jul-12     4:28    W7PUA/M -19     K6FOD   DM04wc  1193    156     Boat
2024-Jul-12     4:28    W7PUA/M -16     KFS/K   CM87tj  745     174     Boat
2024-Jul-12     4:28    W7PUA/M -16     KFS/OMN CM87tj  745     174     Boat
2024-Jul-12     4:28    W7PUA/M 0       N4RVE   CN88kn  501     1       Boat
2024-Jul-12     4:28    W7PUA/M -22     KFS/SW  CM87tj  745     174     Boat
2024-Jul-12     4:28    W7PUA/M -17     KJ6MKIQ CM88oi  636     176     Boat
2024-Jul-12     4:28    W7PUA/M -23     N6GN/K  DN70jo  1532    98      Boat
2024-Jul-12     4:28    W7PUA/M -15     K6PZB   CM88nk  626     177     Boat
2024-Jul-12     4:28    W7PUA/M -19     KA&OEI9 DN40ao  1007    109     Boat
2024-Jul-12     4:28    W7PUA/M -14     KA7OEIQ DN31uo  937     103     Boat
2024-Jul-12     4:28    W7PUA/M -1      KB7GF   DN06ta  443     59      Boat
2024-Jul-12     4:28    W7PUA/M -27     KA9Q    DM12ju  1353    155     Boat
2024-Jul-12     4:28    W7PUA/M -7      W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     4:28    W7PUA/M -22     N6GN2   DN70ll  1550    99      Boat
2024-Jul-12     4:28    W7PUA/M -18     W7PUA   CN84jq  70      5       Boat
2024-Jul-12     4:28    W7PUA/M -14     KA7OEI1 DN31uo  937     103     Boat
2024-Jul-12     4:28    W7PUA/M -21     KP4MD   CM98iq  620     164     Boat
2024-Jul-12     4:28    W7PUA/M -10     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     4:28    W7PUA/M -13     WB7ABP/ CM88ok  627     176     Boat
2024-Jul-12     4:28    W7PUA/M -16     KFS     CM87tj  745     174     Boat
2024-Jul-12     4:22    W7PUA/M -6      WI6P    CN87oh  363     6       Boat
2024-Jul-12     4:22    W7PUA/M -5      W7GLF   CN87vr  416     11      Boat
2024-Jul-12     4:22    W7PUA/M -18     N7KJW   DM34sl  1414    135     Boat
2024-Jul-12     4:22    W7PUA/M -2      W7SZ    CN85    159     7       Boat
2024-Jul-12     4:22    W7PUA/M 0       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     4:22    W7PUA/M -12     N1SRC   DN23ai  594     95      Boat
2024-Jul-12     4:22    W7PUA/M -19     K6FOD   DM04wc  1193    156     Boat
2024-Jul-12     4:22    W7PUA/M -26     KF6ZEO  CM87sr  708     174     Boat
2024-Jul-12     4:22    W7PUA/M -9      KPH     CM88mc  663     177     Boat
2024-Jul-12     4:22    W7PUA/M -15     KFS/OMN CM87tj  745     174     Boat
2024-Jul-12     4:22    W7PUA/M -18     KJ6MKIQ CM88oi  636     176     Boat
2024-Jul-12     4:22    W7PUA/M 1       N4RVE   CN88kn  501     1       Boat
2024-Jul-12     4:22    W7PUA/M -13     K6PZB   CM88nk  626     177     Boat
2024-Jul-12     4:22    W7PUA/M -23     KFS/SW  CM87tj  745     174     Boat
2024-Jul-12     4:22    W7PUA/M -15     KFS/K   CM87tj  745     174     Boat
2024-Jul-12     4:22    W7PUA/M -15     KA7OEIQ DN31uo  937     103     Boat
2024-Jul-12     4:22    W7PUA/M -4      KB7GF   DN06ta  443     59      Boat
2024-Jul-12     4:22    W7PUA/M -25     KA9Q    DM12ju  1353    155     Boat
2024-Jul-12     4:22    W7PUA/M -19     KA&OEI9 DN40ao  1007    109     Boat
2024-Jul-12     4:22    W7PUA/M -9      ND7M    DM16xf  1066    142     Boat
2024-Jul-12     4:22    W7PUA/M -7      W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     4:22    W7PUA/M -15     KA7OEI1 DN31uo  937     103     Boat
2024-Jul-12     4:22    W7PUA/M -17     KP4MD   CM98iq  620     164     Boat
2024-Jul-12     4:22    W7PUA/M -11     WB7ABP/ CM88ok  627     176     Boat
2024-Jul-12     4:22    W7PUA/M -15     W7PUA   CN84jq  70      5       Boat
2024-Jul-12     4:22    W7PUA/M -15     KFS     CM87tj  745     174     Boat

NIGHT  3570 kHz     WSPR    SCREEN GROUND
   Date         Time   Transmit S/N    Receive  Grid    Dist km Brg   Ground
2024-Jul-12     5:18    W7PUA/M -13     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     5:18    W7PUA/M -25     WA5DJJ  DM62ph  1944    127     Screen
2024-Jul-12     5:18    W7PUA/M -18     K7LNA   DN18qb  680     47      Screen
2024-Jul-12     5:18    W7PUA/M -15     K7NOJ   CN85so  184     21      Screen
2024-Jul-12     5:18    W7PUA/M -12     W7SZ    CN85    159     7       Screen
2024-Jul-12     5:18    W7PUA/M -26     K5TR    EM00uf  2680    117     Screen
2024-Jul-12     5:18    W7PUA/M -24     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     5:18    W7PUA/M -17     KK7IXU  CN88no  506     3       Screen
2024-Jul-12     5:18    W7PUA/M -6      KPH     CM88mc  663     177     Screen
2024-Jul-12     5:18    W7PUA/M -16     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     5:18    W7PUA/M -2      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     5:18    W7PUA/M -9      KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     5:18    W7PUA/M -9      KFS/K   CM87tj  745     174     Screen
2024-Jul-12     5:18    W7PUA/M -23     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     5:18    W7PUA/M -23     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     5:18    W7PUA/M -14     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     5:18    W7PUA/M -4      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     5:18    W7PUA/M -14     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     5:18    W7PUA/M -14     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     5:18    W7PUA/M -17     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     5:18    W7PUA/M -19     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     5:18    W7PUA/M -4      W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     5:18    W7PUA/M -14     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     5:18    W7PUA/M -17     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     5:18    W7PUA/M -5      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     5:18    W7PUA/M -16     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     5:18    W7PUA/M -15     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     5:18    W7PUA/M -12     WB7ABP/ CM88ok  627     176     Screen
2024-Jul-12     5:18    W7PUA/M -9      KFS     CM87tj  745     174     Screen
2024-Jul-12     5:14    W7PUA/M -17     K7LNA   DN18qb  680     47      Screen
2024-Jul-12     5:14    W7PUA/M -14     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     5:14    W7PUA/M -24     WA5DJJ  DM62ph  1944    127     Screen
2024-Jul-12     5:14    W7PUA/M -7      W7GLF   CN87vr  416     11      Screen
2024-Jul-12     5:14    W7PUA/M -16     W0AY    DN26    699     65      Screen
2024-Jul-12     5:14    W7PUA/M -14     W7SZ    CN85    159     7       Screen
2024-Jul-12     5:14    W7PUA/M -21     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     5:14    W7PUA/M -17     KK7IXU  CN88no  506     3       Screen
2024-Jul-12     5:14    W7PUA/M 2       N4RVE   CN88kn  501     1       Screen
2024-Jul-12     5:14    W7PUA/M -6      KPH     CM88mc  663     177     Screen
2024-Jul-12     5:14    W7PUA/M -16     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     5:14    W7PUA/M -9      KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     5:14    W7PUA/M -10     KFS/K   CM87tj  745     174     Screen
2024-Jul-12     5:14    W7PUA/M -10     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     5:14    W7PUA/M -15     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     5:14    W7PUA/M -20     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     5:14    W7PUA/M -3      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     5:14    W7PUA/M -11     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     5:14    W7PUA/M -21     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     5:14    W7PUA/M -16     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     5:14    W7PUA/M -20     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     5:14    W7PUA/M -7      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     5:14    W7PUA/M -18     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     5:14    W7PUA/M 1       W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     5:14    W7PUA/M -11     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     5:14    W7PUA/M -11     WB7ABP/ CM88ok  627     176     Screen
2024-Jul-12     5:14    W7PUA/M -14     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     5:14    W7PUA/M -19     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     5:14    W7PUA/M -9      KFS     CM87tj  745     174     Screen
2024-Jul-12     5:10    W7PUA/M -18     WB6JHI  CM97af  768     171     Screen
2024-Jul-12     5:10    W7PUA/M -13     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     5:10    W7PUA/M -26     WA5DJJ  DM62ph  1944    127     Screen
2024-Jul-12     5:10    W7PUA/M -2      W7GLF   CN87vr  416     11      Screen
2024-Jul-12     5:10    W7PUA/M -8      W7SZ    CN85    159     7       Screen
2024-Jul-12     5:10    W7PUA/M -20     KK7IXU  CN88no  506     3       Screen
2024-Jul-12     5:10    W7PUA/M -24     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     5:10    W7PUA/M -16     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     5:10    W7PUA/M -6      KPH     CM88mc  663     177     Screen
2024-Jul-12     5:10    W7PUA/M -12     KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     5:10    W7PUA/M -16     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     5:10    W7PUA/M -5      W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     5:10    W7PUA/M 4       N4RVE   CN88kn  501     1       Screen
2024-Jul-12     5:10    W7PUA/M -22     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     5:10    W7PUA/M -11     KFS/K   CM87tj  745     174     Screen
2024-Jul-12     5:10    W7PUA/M -15     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     5:10    W7PUA/M -17     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     5:10    W7PUA/M -14     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     5:10    W7PUA/M -4      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     5:10    W7PUA/M -11     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     5:10    W7PUA/M -21     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     5:10    W7PUA/M -19     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     5:10    W7PUA/M -4      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     5:10    W7PUA/M -12     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     5:10    W7PUA/M -13     WB7ABP/ CM88ok  627     176     Screen
2024-Jul-12     5:10    W7PUA/M -20     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     5:10    W7PUA/M -16     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     5:10    W7PUA/M -11     KFS     CM87tj  745     174     Screen
2024-Jul-12     5:06    W7PUA/M -14     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     5:06    W7PUA/M -3      W7GLF   CN87vr  416     11      Screen
2024-Jul-12     5:06    W7PUA/M -2      W7CQ    CN83jx  11      144     Screen
2024-Jul-12     5:06    W7PUA/M -10     W7SZ    CN85    159     7       Screen
2024-Jul-12     5:06    W7PUA/M -24     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     5:06    W7PUA/M -13     W0AY    DN26    699     65      Screen
2024-Jul-12     5:06    W7PUA/M -15     KK7IXU  CN88no  506     3       Screen
2024-Jul-12     5:06    W7PUA/M -2      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     5:06    W7PUA/M -15     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     5:06    W7PUA/M -16     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     5:06    W7PUA/M -10     KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     5:06    W7PUA/M -21     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     5:06    W7PUA/M -6      KPH     CM88mc  663     177     Screen
2024-Jul-12     5:06    W7PUA/M -10     KFS/K   CM87tj  745     174     Screen
2024-Jul-12     5:06    W7PUA/M -28     KF6ZEO  CM87sr  708     174     Screen
2024-Jul-12     5:06    W7PUA/M -14     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     5:06    W7PUA/M -12     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     5:06    W7PUA/M -3      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     5:06    W7PUA/M -16     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     5:06    W7PUA/M -21     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     5:06    W7PUA/M -16     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     5:06    W7PUA/M -4      W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     5:06    W7PUA/M -8      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     5:06    W7PUA/M -13     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     5:06    W7PUA/M -18     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     5:06    W7PUA/M -17     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     5:06    W7PUA/M -18     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     5:06    W7PUA/M -12     WB7ABP/ CM88ok  627     176     Screen
2024-Jul-12     5:06    W7PUA/M -10     KFS     CM87tj  745     174     Screen
2024-Jul-12     5:00    W7PUA/M -14     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     5:00    W7PUA/M -1      W7CQ    CN83jx  11      144     Screen
2024-Jul-12     5:00    W7PUA/M -3      W7GLF   CN87vr  416     11      Screen
2024-Jul-12     5:00    W7PUA/M -5      W7SZ    CN85    159     7       Screen
2024-Jul-12     5:00    W7PUA/M -22     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     5:00    W7PUA/M -12     KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     5:00    W7PUA/M -15     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     5:00    W7PUA/M 1       N4RVE   CN88kn  501     1       Screen
2024-Jul-12     5:00    W7PUA/M -5      KPH     CM88mc  663     177     Screen
2024-Jul-12     5:00    W7PUA/M -22     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     5:00    W7PUA/M -12     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     5:00    W7PUA/M -17     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     5:00    W7PUA/M -11     KFS/K   CM87tj  745     174     Screen
2024-Jul-12     5:00    W7PUA/M -16     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     5:00    W7PUA/M -13     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     5:00    W7PUA/M -22     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     5:00    W7PUA/M -15     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     5:00    W7PUA/M -4      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     5:00    W7PUA/M -21     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     5:00    W7PUA/M -2      W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     5:00    W7PUA/M -9      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     5:00    W7PUA/M -20     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     5:00    W7PUA/M -14     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     5:00    W7PUA/M -15     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     5:00    W7PUA/M -13     WB7ABP/ CM88ok  627     176     Screen
2024-Jul-12     5:00    W7PUA/M -11     KFS     CM87tj  745     174     Screen
2024-Jul-12     4:58    W7PUA/M -21     WB6JHI  CM97af  768     171     Screen
2024-Jul-12     4:58    W7PUA/M -14     N7KJW   DM34sl  1414    135     Screen
2024-Jul-12     4:58    W7PUA/M -12     K7LNA   DN18qb  680     47      Screen
2024-Jul-12     4:58    W7PUA/M -3      W7GLF   CN87vr  416     11      Screen
2024-Jul-12     4:58    W7PUA/M -2      W7CQ    CN83jx  11      144     Screen
2024-Jul-12     4:58    W7PUA/M -14     W0AY    DN26    699     65      Screen
2024-Jul-12     4:58    W7PUA/M -9      N1SRC   DN23ai  594     95      Screen
2024-Jul-12     4:58    W7PUA/M -24     N7VVX   DN40bw  997     106     Screen
2024-Jul-12     4:58    W7PUA/M -7      W7SZ    CN85    159     7       Screen
2024-Jul-12     4:58    W7PUA/M -26     KC7PBF  CN85    159     7       Screen
2024-Jul-12     4:58    W7PUA/M -5      KPH     CM88mc  663     177     Screen
2024-Jul-12     4:58    W7PUA/M -16     K6FOD   DM04wc  1193    156     Screen
2024-Jul-12     4:58    W7PUA/M -12     KFS/OMN CM87tj  745     174     Screen
2024-Jul-12     4:58    W7PUA/M -14     KJ6MKIQ CM88oi  636     176     Screen
2024-Jul-12     4:58    W7PUA/M -1      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     4:58    W7PUA/M -18     KFS/SW  CM87tj  745     174     Screen
2024-Jul-12     4:58    W7PUA/M -15     KA&OEI9 DN40ao  1007    109     Screen
2024-Jul-12     4:58    W7PUA/M -22     N6GN/K  DN70jo  1532    98      Screen
2024-Jul-12     4:58    W7PUA/M -12     KFS/K   CM87tj  745     174     Screen
2024-Jul-12     4:58    W7PUA/M -16     K6PZB   CM88nk  626     177     Screen
2024-Jul-12     4:58    W7PUA/M -13     KA7OEIQ DN31uo  937     103     Screen
2024-Jul-12     4:58    W7PUA/M -6      KB7GF   DN06ta  443     59      Screen
2024-Jul-12     4:58    W7PUA/M -22     KA9Q    DM12ju  1353    155     Screen
2024-Jul-12     4:58    W7PUA/M -13     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     4:58    W7PUA/M -4      W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     4:58    W7PUA/M -30     KF6ZEO  CM87sr  708     174     Screen
2024-Jul-12     4:58    W7PUA/M -20     N6GN2   DN70ll  1550    99      Screen
2024-Jul-12     4:58    W7PUA/M -19     KP4MD   CM98iq  620     164     Screen
2024-Jul-12     4:58    W7PUA/M -4      ND7M    DM16xf  1066    142     Screen
2024-Jul-12     4:58    W7PUA/M -18     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     4:58    W7PUA/M -12     KFS     CM87tj  745     174     Screen
2024-Jul-12     4:58    W7PUA/M -10     WB7ABP/ CM88ok  627     176     Screen

DAY  3570 kHz     WSPR    BOAT GROUND
   Date         Time   Transmit S/N    Receive  Grid    Dist km Brg   Ground
2024-Jul-12     16:38   W7PUA/M -18     W7GLF   CN87vr  416     11      Boat
2024-Jul-12     16:38   W7PUA/M 6       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     16:38   W7PUA/M 10      K7UCY/V CN85nq  184     10      Boat
2024-Jul-12     16:38   W7PUA/M -7      W7SZ    CN85    159     7       Boat
2024-Jul-12     16:38   W7PUA/M -27     VE6JY   DO33or  1318    32      Boat
2024-Jul-12     16:38   W7PUA/M -32     KFS/OMN CM87tj  745     174     Boat
2024-Jul-12     16:38   W7PUA/M -16     KPH     CM88mc  663     177     Boat
2024-Jul-12     16:38   W7PUA/M -8      N4RVE   CN88kn  501     1       Boat
2024-Jul-12     16:38   W7PUA/M -29     KFS/K   CM87tj  745     174     Boat
2024-Jul-12     16:38   W7PUA/M -21     KB7GF   DN06ta  443     59      Boat
2024-Jul-12     16:38   W7PUA/M -16     W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     16:38   W7PUA/M -24     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     16:38   W7PUA/M -29     KFS     CM87tj  745     174     Boat
2024-Jul-12     16:36   W7PUA/M -18     W7GLF   CN87vr  416     11      Boat
2024-Jul-12     16:36   W7PUA/M -7      W7SZ    CN85    159     7       Boat
2024-Jul-12     16:36   W7PUA/M 6       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     16:36   W7PUA/M -16     KPH     CM88mc  663     177     Boat
2024-Jul-12     16:36   W7PUA/M -20     KB7GF   DN06ta  443     59      Boat
2024-Jul-12     16:36   W7PUA/M -25     VE6JY   DO33or  1318    32      Boat
2024-Jul-12     16:36   W7PUA/M -12     N4RVE   CN88kn  501     1       Boat
2024-Jul-12     16:36   W7PUA/M -15     W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     16:36   W7PUA/M -26     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     16:34   W7PUA/M -19     W7GLF   CN87vr  416     11      Boat
2024-Jul-12     16:34   W7PUA/M 6       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     16:34   W7PUA/M 11      K7UCY/V CN85nq  184     10      Boat
2024-Jul-12     16:34   W7PUA/M -9      W7SZ    CN85    159     7       Boat
2024-Jul-12     16:34   W7PUA/M -16     KPH     CM88mc  663     177     Boat
2024-Jul-12     16:34   W7PUA/M -13     N4RVE   CN88kn  501     1       Boat
2024-Jul-12     16:34   W7PUA/M -17     KB7GF   DN06ta  443     59      Boat
2024-Jul-12     16:34   W7PUA/M -15     W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     16:34   W7PUA/M -27     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     16:30   W7PUA/M 6       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     16:30   W7PUA/M -9      W7SZ    CN85    159     7       Boat
2024-Jul-12     16:30   W7PUA/M 11      K7UCY/V CN85nq  184     10      Boat
2024-Jul-12     16:30   W7PUA/M -15     KPH     CM88mc  663     177     Boat
2024-Jul-12     16:30   W7PUA/M -9      N4RVE   CN88kn  501     1       Boat
2024-Jul-12     16:30   W7PUA/M -21     W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     16:30   W7PUA/M -23     KB7GF   DN06ta  443     59      Boat
2024-Jul-12     16:30   W7PUA/M -28     ND7M    DM16xf  1066    142     Boat
2024-Jul-12     16:26   W7PUA/M -16     W7GLF   CN87vr  416     11      Boat
2024-Jul-12     16:26   W7PUA/M -6      W7SZ    CN85    159     7       Boat
2024-Jul-12     16:26   W7PUA/M 6       W7CQ    CN83jx  11      144     Boat
2024-Jul-12     16:26   W7PUA/M -13     KPH     CM88mc  663     177     Boat
2024-Jul-12     16:26   W7PUA/M -13     N4RVE   CN88kn  501     1       Boat
2024-Jul-12     16:26   W7PUA/M -15     W7WKR-1 CN98pi  517     22      Boat
2024-Jul-12     16:26   W7PUA/M -29     ND7M    DM16xf  1066    142     Boat

DAY  3570 kHz     WSPR    SCREEN GROUND
   Date         Time   Transmit S/N    Receive  Grid    Dist km Brg   Ground
2024-Jul-12     16:10   W7PUA/M 7       W7CQ    CN83jx  11      144     Screen
2024-Jul-12     16:10   W7PUA/M -13     KPH     CM88mc  663     177     Screen
2024-Jul-12     16:10   W7PUA/M -6      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     16:10   W7PUA/M -20     W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     16:10   W7PUA/M -20     KB7GF   DN06ta  443     59      Screen
2024-Jul-12     16:10   W7PUA/M -24     ND7M    DM16xf  1066    142     Screen
2024-Jul-12     16:14   W7PUA/M 7       W7CQ    CN83jx  11      144     Screen
2024-Jul-12     16:14   W7PUA/M -3      W7SZ    CN85    159     7       Screen
2024-Jul-12     16:14   W7PUA/M -18     W7GLF   CN87vr  416     11      Screen
2024-Jul-12     16:14   W7PUA/M -27     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     16:14   W7PUA/M -15     KPH     CM88mc  663     177     Screen
2024-Jul-12     16:14   W7PUA/M -5      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     16:14   W7PUA/M -17     KB7GF   DN06ta  443     59      Screen
2024-Jul-12     16:14   W7PUA/M -23     VE6JY   DO33or  1318    32      Screen
2024-Jul-12     16:14   W7PUA/M -20     W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     16:14   W7PUA/M -24     ND7M    DM16xf  1066    142     Screen
2024-Jul-12     16:14   W7PUA/M -30     KA7OEI1 DN31uo  937     103     Screen
2024-Jul-12     16:18   W7PUA/M -5      W7SZ    CN85    159     7       Screen
2024-Jul-12     16:18   W7PUA/M 7       W7CQ    CN83jx  11      144     Screen
2024-Jul-12     16:18   W7PUA/M -26     W7PUA   CN84jq  70      5       Screen
2024-Jul-12     16:18   W7PUA/M -14     KPH     CM88mc  663     177     Screen
2024-Jul-12     16:18   W7PUA/M -7      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     16:18   W7PUA/M -22     KB7GF   DN06ta  443     59      Screen
2024-Jul-12     16:18   W7PUA/M -21     W7WKR-1 CN98pi  517     22      Screen
2024-Jul-12     16:18   W7PUA/M -26     ND7M    DM16xf  1066    142     Screen
2024-Jul-12     16:18   W7PUA/M -25     VE6JY   DO33or  1318    32      Screen
2024-Jul-12     16:22   W7PUA/M -4      W7OWO   CN85lh  140     8       Screen
2024-Jul-12     16:22   W7PUA/M 7       W7CQ    CN83jx  11      144     Screen
2024-Jul-12     16:22   W7PUA/M -16     W7GLF   CN87vr  416     11      Screen
2024-Jul-12     16:22   W7PUA/M -5      W7SZ    CN85    159     7       Screen
2024-Jul-12     16:22   W7PUA/M -4      N4RVE   CN88kn  501     1       Screen
2024-Jul-12     16:22   W7PUA/M -18     KPH     CM88mc  663     177     Screen
2024-Jul-12     16:22   W7PUA/M -20     KB7GF   DN06ta  443     59      Screen
2024-Jul-12     16:22   W7PUA/M -23     W7WKR-1 CN98pi  517     22      Screen