HFU HF Underground
Loggings => Utility => Topic started by: Laidbackdx on March 16, 2019, 0202 UTC
-
Two way radio communication two men discussing about probagation then one of the men makes what he calls a net call. Fax sounding noise
-
This sounds like it could be US Army MARS. The data mode would have been MIL-STD-188-110 serial waveform. I often hear MARS ops on the 4 MHZ simplex maritime mobile frequencies in the morning.
In general, operating in a controlled net suggests military or other organized users, but informally chatting in SSB voice prior passing data traffic has MARS written all over it.
-
The areas above and below the lower HAM bands are often populated with MARS traffic. Here's something I put together some years ago on what MARS traffic i could catch;
FREQ NET USE QRG ZULU DATE
03.269 D/V 0100Z 03.10.14
03.390 4X9B D/V 0200Z 11.15.13
04.007 5G1B D/V 0030Z 02.14.14
04.011 1M2B D/V 2300Z 02.15.14
04.011 6E1B D/V 0100Z 03.06.14
04.011 6E2B D/V 0100Z 03.09.14
04.011 6N1B D/V 0300Z 02.18.14
04.011 6N1C D/V 0300Z 03.05.14
04.011 6S1B D/V 0200Z 02.14.14
04.011 6S4C D/V 0200Z 02.14.15
04.011 6L1B D/V 0000Z 02.16.14
04.013.5 4K2B D/V 0000Z 02.16.14
04.013.5 4F3B D/V 0100Z 03.02.14
04.018 A7I D/V 0100Z 02.14.14
04.018 A7A D/V 0100Z 03.11.14
04.018 A7A D/V 0200Z 02.14.14
04.018 A7M D/V 0300Z 02.14.14
04.021 A1A M066* 2130Z 02.19.14
04.021 A6A M066* 0130Z 03.05.14
04.024 A5M D/V M099 0030Z 02.17.14
04.024 A5A D/V M099 0100Z 02.23.14
04.024 A5H D/V M099 2200Z 02.14.14
04.027 A3A D/V 2300Z 02.14.14
04.030 A4S D/V M157 2330Z 03.09.14
04.030 A4B D/V M157 0000Z 03.26.14
04.030 A4J D/V M157 0130Z 02.14.14
04.030 A4A D/V M157 0200Z 02.14.14
04.030 A4H D/V M157 0000Z 02.16.14
04.030 A4H D/V M157 0130Z 03.02.14
04.030 A4S D/V M157 0130Z 03.02.14
04.033 2200Z 02.15.14
04.038.5 4G2B C NCK 0130Z 03.05.14
04.038.5 4H2B D/V NCK 0200Z 02.16.14
04.038.5 4A2B D/V NCK 0300Z 02.16.14
04.041 5M1B D/V NCL 2330Z 02.14.14
04.041 5M3B D/V NCL 0000Z 02.14.14
04.041 5B1B D/V NCL 0000Z 03.29.14
04.041 5N5B D/V NCL 0030Z 02.14.14
05.394.5 D/V M165 0330Z 03.05.14
06.823 A6J* TXGRD 0100Z 03.01.14
06.913 D/V M117 0100Z 03.29.14
SERVICE/NET ID MODES
FLFL = USN/MC D DIGITAL
LFL = Army/AF V VOICE
D/V BOTH
C cw
QRG DESIGNATION CALLSIGN PREFIX
LFFF = USA NNN = USN/MC
LLL = USN/MC AA_ = USA
AFA = USAF
NAVMARCORMARS
CONUS/REGIONAL:
QRG FREQUENCY NECOS DATA QRGS
NCL 4042.5 KHZ NAV NCP
NFK 7382.5 KHZ NAV, ASG NDE
NNA 14385.0 KHZ NAV, ASG
INDIANA USNMCMARS REGION 5 ECOM NETS:
QRG (TIME ZULU) USAGE
NFM (1200Z-2159Z) PRIMARY VOICE
NCE (1200Z-2159Z) ALTERNATE
NCL (1200Z-2159Z) ALTERNATE
NCO TRAFFIC
NFK (2200Z-1159Z) PRIMARY VOICE
NCL SECONDARY
INDIANA CMDNET
NCL Voice/Digital
NCU
NFG
NET STATE USAGE
A4J TENN ADMIN
* = TENTATIVE
primary center-frequency 5358.5 kHz
secondary center-frequency 5373.0 kHz