VHF MARINE RADIO

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MMSI Registrant Changes

Last post by jimh « Mon Apr 21, 2025 10:28 pm
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by jimh » Sun Apr 13, 2025 4:29 pm

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MMSI--Maritime Mobile Service Identity--New Information Source

Last post by jimh « Wed Apr 24, 2024 12:51 pm

by jimh » Wed Apr 24, 2024 12:51 pm

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Handheld DSC Radio in USA: Allowed Use; MMSI Assignment

Last post by jimh « Wed Apr 24, 2024 12:59 pm
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by jimh » Sun Sep 10, 2017 2:12 pm

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SURVEY POLL: VHF Marine Band Fixed-mount Radios

Last post by jimh « Thu Nov 12, 2020 9:22 am
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This topic has a poll. by jimh » Fri Nov 08, 2019 10:17 am

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FCC Modifies Regulations to Permit Handheld Radios to be Used On Shore

Last post by jimh « Thu Aug 03, 2017 9:42 pm
Replies: 4
by jimh » Thu Jun 22, 2017 1:21 pm

4 Replies

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Transmission Line Loss: Four Coaxial Cables Compared

Last post by jimh « Fri Jun 13, 2025 10:07 am
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by jimh » Thu Jun 12, 2025 8:09 am

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Propagation of VHF Radio Signals

Last post by jimh « Wed Jun 11, 2025 1:41 pm
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by jimh » Mon Jun 09, 2025 9:37 am

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Effect of Changing Length of Transmission Line on VSWR

Last post by jimh « Mon Jun 09, 2025 9:25 am

by jimh » Mon Jun 09, 2025 9:25 am

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Bench Power Supply 13.8-Volt Linear Regulator

Last post by jimh « Mon Jun 02, 2025 9:36 am

by jimh » Mon Jun 02, 2025 9:36 am

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Measuring VSWR on VHF Marine Band Antennas

Last post by jimh « Mon Jun 02, 2025 8:42 am

by jimh » Mon Jun 02, 2025 8:42 am

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Antenna for Reception of Broadcast Television Signals

Last post by Jefecinco « Fri Jan 10, 2025 11:15 am
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by Jefecinco » Sun Nov 24, 2024 9:52 am

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NOAA Weather Radio Reception Report: Northport

Last post by jimh « Tue Nov 19, 2024 11:31 am
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Attachment(s) by jimh » Sun Jul 31, 2022 8:28 am

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U.S. Coast Guard Announces Use of Four-digit Radio Channel Names

Last post by jimh « Wed Nov 13, 2024 7:09 am

by jimh » Wed Nov 13, 2024 7:09 am

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RAYMARINE AXIOM Pro shows AIS Target as String of Diamonds

Last post by jimh « Thu Sep 19, 2024 5:29 am
Replies: 1
Attachment(s) by Cinders » Wed Sep 18, 2024 7:31 am

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Measuring Antenna VSWR

Last post by jimh « Sat Aug 10, 2024 5:14 pm

by jimh » Sat Aug 10, 2024 5:14 pm

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Effect of Transmission Line Loss on VSWR

Last post by jimh « Fri Aug 09, 2024 5:46 pm

by jimh » Fri Aug 09, 2024 5:46 pm

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U.S. Coast Guard Radio Procedures

Last post by jimh « Sat Jul 13, 2024 11:17 am

by jimh » Sat Jul 13, 2024 11:17 am

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DSC Radio: Resetting the MMSI with unique key code

Last post by jimh « Sat Jun 22, 2024 11:36 am

by jimh » Sat Jun 22, 2024 11:36 am

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AIS Range: Reception Report

Last post by jimh « Fri Jun 21, 2024 10:38 am
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by jimh » Fri Jun 07, 2024 2:57 pm

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Calculating Range of Communication

Last post by jimh « Thu Jan 18, 2024 11:47 am
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Attachment(s) by jimh » Mon Dec 11, 2023 4:58 pm

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Coaxial Cable Reference

Last post by jimh « Wed Nov 22, 2023 10:09 am

by jimh » Wed Nov 22, 2023 10:09 am

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Restricted Radiotelephone Operator Permit

Last post by jimh « Wed Sep 06, 2023 12:00 am
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by Jefecinco » Mon Sep 04, 2023 10:12 am

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FCC Licensing for the Maritime Radio Service for Recreational Boaters

Last post by jimh « Mon Sep 04, 2023 8:11 am

by jimh » Mon Sep 04, 2023 8:11 am

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VHF Marine Band DSC Radios 2023

Last post by conch « Mon Aug 28, 2023 2:41 pm
Replies: 5
by jimh » Thu Jul 27, 2023 12:16 pm

5 Replies

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Best VHF Marine Band Radio Antenna

Last post by jimh « Thu Aug 24, 2023 7:48 am
Replies: 6
by padrefigure » Wed Mar 15, 2023 5:47 pm

6 Replies

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Required Radio Watch on Channel 16

Last post by jimh « Sun Aug 06, 2023 10:16 am

by jimh » Sun Aug 06, 2023 10:16 am

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Antennas for AIS Transmitters

Last post by jimh « Sat May 06, 2023 11:36 am
Replies: 3
by jimh » Fri Apr 16, 2021 1:53 pm

3 Replies

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Sat May 06, 2023 11:36 am
FCC Now Offering VHF Vessel Handheld MMSI Registration

Last post by jimh « Tue Feb 28, 2023 8:40 am
Replies: 2
by jimh » Tue Feb 28, 2023 8:29 am

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MMSI Lookup

Last post by jimh « Fri Feb 24, 2023 10:03 am
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by jimh » Thu Oct 11, 2018 7:14 am

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Receiver Testing with NOAA Weather Radio Broadcasts

Last post by jimh « Thu Oct 13, 2022 10:27 am
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by jimh » Fri Jun 01, 2018 10:09 am

5 Replies

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Using Handheld Radio as Alternative to Fixed Mount Radio with Antenna

Last post by Phil T « Mon Aug 29, 2022 8:06 am
Replies: 4
by Slacky Mac » Mon Aug 22, 2022 1:08 pm

4 Replies

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What's Wrong With This Picture: 170 MONTAUK Antenna

Last post by jimh « Mon Aug 22, 2022 7:47 am
Replies: 2
Attachment(s) by jimh » Sat Aug 20, 2022 11:08 am

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Choke Balun

Last post by jimh « Fri Aug 05, 2022 9:16 am
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Attachment(s) by Tom Hemphill » Tue Aug 02, 2022 6:21 pm

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Fri Aug 05, 2022 9:16 am
MMSI List of Allocated Blocks in USA

Last post by jimh « Tue Jul 26, 2022 11:49 am

by jimh » Tue Jul 26, 2022 11:49 am

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Tue Jul 26, 2022 11:49 am
Uniden UM725, UM725G, and UM725GBT Radios

Last post by jimh « Fri Jun 17, 2022 9:48 am

Attachment(s) by jimh » Fri Jun 17, 2022 9:48 am

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16627 Views

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ICOM M330G- Ground; GPS Antenna

Last post by Don SSDD « Mon May 09, 2022 1:51 pm
Replies: 3
by Don SSDD » Sun May 08, 2022 8:19 am

3 Replies

15949 Views

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Understanding MMSI, AIS

Last post by jimh « Wed Mar 09, 2022 11:48 am
Replies: 4
by HandsenSten » Tue Mar 08, 2022 6:10 pm

4 Replies

14742 Views

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EPIRB and SARSAT: Next Generation MEOSAR

Last post by jimh « Mon Jan 03, 2022 4:11 pm
Replies: 3
by jimh » Wed Dec 14, 2016 11:17 am

3 Replies

25950 Views

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Reset of MMSI for DSC Radio by End User

Last post by jimh « Fri Dec 10, 2021 12:56 pm
Replies: 21
Attachment(s) by jimh » Tue Sep 19, 2017 12:38 pm

21 Replies

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Ocean Signal AIS Class-B SOTDMA Transceiver CB1, CB2

Last post by jimh « Mon Dec 06, 2021 10:05 am

Attachment(s) by jimh » Mon Dec 06, 2021 10:05 am

0 Replies

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My FCC Ship Station License: A Catch-22 Situation

Last post by jimh « Sun Nov 07, 2021 10:10 am
Replies: 2
by jimh » Thu Jun 10, 2021 2:48 pm

2 Replies

16951 Views

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Sun Nov 07, 2021 10:10 am
VHF Marine Band Channels--Simplified

Last post by jimh « Tue Nov 02, 2021 9:03 am
Replies: 2
Attachment(s) by jimh » Mon Sep 16, 2019 1:13 pm

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Range of USCG RESCUE21 System

Last post by jimh « Sun Oct 03, 2021 9:25 am

by jimh » Sun Oct 03, 2021 9:25 am

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14611 Views

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Mandatory Radio Watch on Channel 16

Last post by jimh « Sun Aug 29, 2021 10:27 am

by jimh » Sun Aug 29, 2021 10:27 am

0 Replies

21429 Views

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Radio Check: Proper Procedures

Last post by jimh « Fri Aug 27, 2021 10:20 am

by jimh » Fri Aug 27, 2021 10:20 am

0 Replies

19479 Views

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Fri Aug 27, 2021 10:20 am
New AIS Class B SOTDMA Will Operate on Four Channels

Last post by jimh « Thu Aug 19, 2021 10:30 am

by jimh » Thu Aug 19, 2021 10:30 am

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19355 Views

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DSC Class-D VHF and Position Reporting

Last post by jimh « Thu Apr 29, 2021 11:38 am

Attachment(s) by jimh » Thu Apr 29, 2021 11:38 am

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Effect of Transmission Line Loss on VSWR Measurement

Last post by jimh « Sat Apr 17, 2021 2:16 pm

by jimh » Sat Apr 17, 2021 2:16 pm

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19938 Views

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Standard-Horizon GX6000, GX6500

Last post by jimh « Mon Mar 01, 2021 10:51 am
Replies: 55
1

2
Attachment(s) by jimh » Sun Oct 09, 2016 12:29 pm
55 Replies

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Standard-Horizon GX2400GPS VHF DSC Radio

Last post by jimh « Mon Jan 11, 2021 11:07 am
Replies: 10
Attachment(s) by jimh » Mon Feb 17, 2020 10:26 am

10 Replies

27999 Views

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Effect of Antenna Height on Signal Strength

Last post by jimh « Wed Jan 06, 2021 9:08 am
Replies: 10
by jimh » Fri Jan 13, 2017 12:45 pm

10 Replies

44627 Views

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Coaxial Transmission Line Outer Insulating Jacket Damage

Last post by jimh « Thu Dec 31, 2020 1:30 pm
Replies: 7
Attachment(s) by moabelite » Mon Dec 28, 2020 5:58 pm

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FCC Advisory on MMSI

Last post by jimh « Thu Dec 24, 2020 1:17 pm

by jimh » Thu Dec 24, 2020 1:17 pm

0 Replies

19185 Views

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Ship Station Licensing

Last post by jimh « Sat Dec 19, 2020 10:35 am

by jimh » Sat Dec 19, 2020 10:35 am

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19036 Views

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GARMIN: DSC Radio MMSI Reset and other problems

Last post by jimh « Thu Dec 03, 2020 1:52 pm
Replies: 12
by porthole » Wed Dec 02, 2020 10:33 am

12 Replies

28497 Views

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Antenna Mount for Center Console with Bimini Top

Last post by jimh « Sun Nov 29, 2020 9:27 am
Replies: 17
Attachment(s) by roundle1979 » Sat Nov 21, 2020 9:16 am

17 Replies

29683 Views

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Free Space Loss; Line of Sight

Last post by jimh « Sun Nov 01, 2020 10:21 am
Replies: 1
by jimh » Sun Nov 01, 2020 9:01 am

1 Replies

15565 Views

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SEA TOW Automated Radio Check Service Discontinued

Last post by jimh « Tue Oct 27, 2020 9:12 am

Attachment(s) by jimh » Tue Oct 27, 2020 9:12 am

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VHF Marine Band Radio Antenna Recommendation

Last post by Spc337 « Tue Oct 13, 2020 5:24 pm
Replies: 13
by Spc337 » Wed Oct 07, 2020 11:40 am

13 Replies

27896 Views

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Standard-Horizon Rebates: GX1850G; GX1400

Last post by jimh « Sat Sep 19, 2020 11:20 am
Replies: 1
by jimh » Sat Sep 19, 2020 11:05 am

1 Replies

15696 Views

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MORAD VHF-156HD Antenna and Mounts

Last post by jimh « Fri Sep 18, 2020 1:42 pm
Replies: 2
by jimh » Wed Feb 21, 2018 1:16 pm

2 Replies

24040 Views

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A Captivating Saga of VHF Antennas

Last post by jimh « Sat Aug 29, 2020 10:59 am
Replies: 12
Attachment(s) by jimh » Sun Aug 09, 2020 10:57 am

12 Replies

27243 Views

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GAM SS-2 Antenna Fails after 12 years

Last post by jimh « Wed Aug 05, 2020 10:44 am
Replies: 1
by jimh » Fri Sep 13, 2019 10:33 am

1 Replies

28665 Views

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USCG Encrypted Radio Traffic

Last post by peteinsf « Fri May 22, 2020 8:03 am
Replies: 9
by peteinsf » Tue Jul 26, 2016 3:35 pm

9 Replies

23490 Views

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Fri May 22, 2020 8:03 am
FCC Enforcement Actions related to VHF Marine Band Radio and GMRS

Last post by jimh « Tue May 12, 2020 10:44 am

by jimh » Tue May 12, 2020 10:44 am

0 Replies

17091 Views

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VHF Radio Mounting Location

Last post by jimh « Thu Apr 23, 2020 10:18 am
Replies: 1
by FL21WAC » Thu Apr 23, 2020 10:04 am

1 Replies

16363 Views

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AIS PAtoN

Last post by jimh « Wed Apr 22, 2020 8:17 am

by jimh » Wed Apr 22, 2020 8:17 am

0 Replies

16632 Views

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Em-trak Announces New B900 Series of AIS Transponders

Last post by jimh « Thu Mar 19, 2020 9:07 am

Attachment(s) by jimh » Thu Mar 19, 2020 9:07 am

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17467 Views

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Lowrance LINK-9; SIMRAD RS20, RS40, RS40B

Last post by jimh « Sat Jan 11, 2020 1:58 pm
Replies: 4
Attachment(s) by jimh » Sat Oct 20, 2018 11:17 am

4 Replies

25347 Views

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Mounting Two VHF Marine Band Antennas on a Small Boat

Last post by jimh « Sun Dec 22, 2019 9:35 pm
Replies: 1
Attachment(s) by jimh » Fri Feb 15, 2019 3:13 pm

1 Replies

25172 Views

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VSWR Measurement

Last post by jimh « Fri Dec 20, 2019 2:18 pm
Replies: 4
by jimh » Fri Dec 20, 2019 11:07 am

4 Replies

18653 Views

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Standard-Horizon HX890: Change MMSI

Last post by jimh « Wed Dec 18, 2019 11:29 am
Replies: 11
by PatSea » Sun Dec 15, 2019 4:34 pm

11 Replies

27120 Views

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Wed Dec 18, 2019 11:29 am
FCC Certification Procedures for VHF Marine Band Radios

Last post by jimh « Sun Nov 10, 2019 9:59 am

by jimh » Sun Nov 10, 2019 9:59 am

0 Replies

17463 Views

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Standard-Horizon GX1400 VHF Marine Band DSC Radio

Last post by jimh « Sat Nov 09, 2019 11:59 am

Attachment(s) by jimh » Sat Nov 09, 2019 11:59 am

0 Replies

20613 Views

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Required Radio Watch

Last post by jimh « Mon Sep 16, 2019 10:37 am
Replies: 2
by jimh » Sun Sep 15, 2019 1:30 pm

2 Replies

21884 Views

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Standard-Horizon GX1850 VHF Marine Band DSC Radio

Last post by jimh « Wed Sep 11, 2019 9:26 am
Replies: 4
Attachment(s) by jimh » Wed Feb 06, 2019 10:32 am

4 Replies

28623 Views

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FME Coaxial Cable Connectors

Last post by jimh « Tue Aug 27, 2019 9:38 am
Replies: 5
Attachment(s) by jimh » Sun Dec 20, 2015 7:55 am

5 Replies

37457 Views

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Tue Aug 27, 2019 9:38 am
Notes From Installation of an FME Connector

Last post by jimh « Sat Aug 17, 2019 7:57 am
Replies: 1
by jimh » Wed Aug 14, 2019 4:45 pm

1 Replies

21579 Views

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Sat Aug 17, 2019 7:57 am
AIS and VOICE Communication Ranges Compared

Last post by jimh « Sat Aug 10, 2019 9:34 am

by jimh » Sat Aug 10, 2019 9:34 am

0 Replies

28274 Views

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Sat Aug 10, 2019 9:34 am
NMEA weirdness on ICOM M323

Last post by jimh « Sun Jun 30, 2019 2:38 pm
Replies: 6
by gaffer206 » Sun Jun 30, 2019 4:05 am

6 Replies

27063 Views

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Standard-Horizon HX890, CLASS-H DSC Radio

Last post by jimh « Tue Jun 25, 2019 8:32 am
Replies: 6
Attachment(s) by SVGrendel » Tue Dec 11, 2018 6:34 pm

6 Replies

33279 Views

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Standard Horizon HX870 Features

Last post by jimh « Sat Jun 22, 2019 4:13 pm
Replies: 8
by MattFL » Fri Apr 26, 2019 11:44 am

8 Replies

29636 Views

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Sat Jun 22, 2019 4:13 pm
Antenna Splitter for AM-FM Broadcast Band Receiver

Last post by jimh « Sat Jun 08, 2019 12:45 pm
Replies: 1
by jimh » Fri Jun 07, 2019 11:02 am

1 Replies

21632 Views

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Sat Jun 08, 2019 12:45 pm
SEA AREA 1 and Radio Range Calculation

Last post by jimh « Tue Jun 04, 2019 9:18 am
Replies: 2
by jimh » Mon Jun 03, 2019 11:46 pm

2 Replies

22310 Views

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VHF DSC Radios: Distress Calls with no MMSI

Last post by jimh « Sun May 19, 2019 11:30 am

by jimh » Sun May 19, 2019 11:30 am

0 Replies

30229 Views

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Odd radio behavior

Last post by jimh « Fri May 17, 2019 2:32 pm
Replies: 4
by MattFL » Mon May 13, 2019 11:23 am

4 Replies

24578 Views

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Fri May 17, 2019 2:32 pm
Radio Antenna Location on Small Center Console

Last post by jimh « Thu May 09, 2019 9:14 am
Replies: 21
Attachment(s) by Beerspitnight » Sat Mar 05, 2016 4:25 am

21 Replies

55240 Views

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Thu May 09, 2019 9:14 am
Choosing a Handheld DSC Radio

Last post by jimh « Wed May 01, 2019 6:45 am
Replies: 11
by MattFL » Sat Apr 20, 2019 10:51 am

11 Replies

32280 Views

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Wed May 01, 2019 6:45 am
DSC Class-D v. Class-H

Last post by jimh « Sat Apr 27, 2019 4:38 pm

by jimh » Sat Apr 27, 2019 4:38 pm

0 Replies

30780 Views

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New DSC Recommendations

Last post by jimh « Fri Apr 26, 2019 11:37 am
Replies: 14
by jimh » Fri Oct 14, 2016 10:20 am

14 Replies

46932 Views

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Fri Apr 26, 2019 11:37 am
The RANGE of AIS Signals; Class-A and Class-B Compared

Last post by jimh « Mon Jan 28, 2019 2:12 pm
Replies: 4
by jimh » Thu Nov 09, 2017 2:02 pm

4 Replies

25724 Views

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Mon Jan 28, 2019 2:12 pm
Understanding the deciBel or dB

Last post by jimh « Mon Jan 28, 2019 10:02 am
Replies: 1
by jimh » Thu Jan 10, 2019 11:21 am

1 Replies

20980 Views

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Mon Jan 28, 2019 10:02 am
Display of AIS AtoN on Lowrance HDS-8

Last post by jimh « Thu Dec 20, 2018 10:14 am
Replies: 19
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by jimh » Tue Dec 11, 2018 11:22 am

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by jimh » Tue Dec 11, 2018 11:15 am

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by jimh » Thu Nov 08, 2018 3:16 pm

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by jimh » Sat Sep 01, 2018 12:00 pm

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