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Search took 0.01 seconds. Search: Posts Made By: joehersey
Forum: Marine Electronics 26-02-2024, 07:36
Replies: 1
Views: 608
Posted By joehersey
USCG Safety Alert: Ship AIS blocked whenever VHF radio is keyed

The US Coast Guard just released a Marine Safety Alert advising that AIS onboard a vessel will be blocked while the ship's VHF radiotelephone is being keyed, regardless of how the antennas of the two...
Forum: Marine Electronics 26-02-2024, 07:22
Replies: 14
Views: 2,065
Posted By joehersey
Re: Transfer or get new MMSI #?

The US Coast Guard has been updating its MMSI website to address the questions being raised here: https://www.navcen.uscg.gov/maritime-mobile-service-identity. They have also scheduled recurring...
Forum: Europe & Mediterranean 09-06-2023, 06:48
Replies: 23
Views: 2,443
Posted By joehersey
Re: Radio Operators Certificate in EU

All US radios should have a US/International selection switch or menu setting.
Forum: Marine Electronics 07-06-2023, 16:56
Replies: 11
Views: 583
Posted By joehersey
Re: US Coast Guard rebuilds its MMSI public webpages

Rec ITU-R M.493-15 §12.4 states this rule, which applies to all DSC radios internationally: "Once stored, it should only be possible for an authorised user to change the MMSI with advice/cooperation...
Forum: Marine Electronics 07-06-2023, 15:34
Replies: 11
Views: 583
Posted By joehersey
Re: US Coast Guard rebuilds its MMSI public webpages

Indeed!!

The US tried to get ITU to ease their restrictions on users resetting MMSIs, but were rebuffed. However, ITU did ease the restrictions enough to allow users to reset MMSIs "with the...
Forum: Marine Electronics 07-06-2023, 14:16
Replies: 11
Views: 583
Posted By joehersey
US Coast Guard rebuilds its MMSI public webpages

Today the US Coast Guard posted its rebuilt Maritime Mobile Service Identity (MMSI) webpages (https://www.navcen.uscg.gov/maritime-mobile-service-identity), intended to make it easier to find what...
Forum: Marine Electronics 02-01-2023, 09:11
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

This UK MCA Safety Bulletin (https://britishmarine.co.uk/News/2022/August/MCA-releases-a-safety-bulletin-on-the-correct-programming-of-EPIRBS) explains the problem. It's a serious one: Distress...
Forum: Marine Electronics 29-12-2022, 14:24
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

Non U.S. vessels can obtain “daughter craft” MMSIs, craft associated with a parent ship, for each of those in towed boats: 98MIDxxxx. US does not recognize daughter craft MMSIs. US vessels should...
Forum: Marine Electronics 26-12-2022, 16:45
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

Nope, you cannot add an 8 and drop the last digit of a ship station MMSI to get a handheld identity. Not sure why that would be much benefit, since those needing a handheld identity may not have or...
Forum: Marine Electronics 24-12-2022, 18:10
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

No change in the requirement. It’s the ship station MMSI (MIDxxxxxx), the type of MMSI BOAT US assigns, that is assigned to a physical vessel and prevents the radio using that identity from moving...
Forum: Marine Electronics 23-12-2022, 19:36
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

Yes I believe you are right. I believe you’d only get one MMSI per license, ship station or VHF handheld. I’d be interest in hearing what you find out after going through the process.
Forum: Marine Electronics 23-12-2022, 19:33
Replies: 43
Views: 5,000
Posted By joehersey
Re: US begins issuing and registering VHF handheld MMSIs

Yes, but only if the handheld is used with, kept with, and registered with a single, specific boat. FCC has given some leeway here in the past, since VHF handheld MMSIs haven’t been available until...
Forum: Marine Electronics 23-12-2022, 18:03
Replies: 43
Views: 5,000
Posted By joehersey
US begins issuing and registering VHF handheld MMSIs

A few weeks ago, the US FCC quietly announced (https://www.fcc.gov/wireless/bureau-divisions/mobility-division/maritime-mobile/vhf-handheld-stations) that it would now begin issuing VHF handheld...
Forum: Marine Electronics 08-12-2022, 03:43
Replies: 12
Views: 2,128
Posted By joehersey
Re: Reset MMSI on RAY60

Agree that this is not a very customer friendly approach. We (RTCM.org) are preparing updates to the certification standard addressing these radios (IEC 62238) which, when complete, will be sent to...
Forum: Liveaboard's Forum 17-06-2022, 06:48
Replies: 124
Views: 14,406
Posted By joehersey
Re: Dish Feuds With SpaceX Over Starlink Dishes Being Used on Moving Boats, Cars

FCC Seeks Input on Offshore Spectrum Needs and Uses

https://www.fcc.gov/document/fcc-seeks-input-offshore-spectrum-needs-and-uses-0

FCC's seeking of comments on offshore spectrum needs,...
Forum: Marine Electronics 18-03-2022, 10:07
Replies: 20
Views: 16,426
Posted By joehersey
Re: MMSI programing on icom radio

Can't blame the FCC on this. The restriction came from the International Telecommunications Union (ITU) which is responsible for DSC standards. ITU-R M.493 has long mandated that "Once stored, it...
Forum: Marine Electronics 07-12-2021, 09:17
Replies: 2
Views: 1,153
Posted By joehersey
US Coast Guard ceases all HF voice distress watch keeping on 7 February 2022

Published in today's Federal Register. https://www.regulations.gov/document/USCG-2020-0668-0006

High Frequency digital selective calling, high frequency voice in waters off Alaska and Guam, and...
Forum: Marine Electronics 23-09-2021, 15:10
Replies: 62
Views: 7,408
Posted By joehersey
Re: Disputed interference between LED masthead light and VHF antenna

Bycrick, right on!

People expressed surprise when they discovered IEC 60945 (maritime) and CISPR 15 (lighting)-compliant lights causing severe interference. Yet when you look at those EMC...
Forum: Marine Electronics 23-09-2021, 14:04
Replies: 62
Views: 7,408
Posted By joehersey
Re: Disputed interference between LED masthead light and VHF antenna

Bycrick, micro volts into a radio receiver’s antenna connector and micro volts per meter field strength seen by an antenna are two very different things. VHF radio sensitivity is spec’d at 2 micro...
Forum: Marine Electronics 23-09-2021, 07:39
Replies: 62
Views: 7,408
Posted By joehersey
Re: Disputed interference between LED masthead light and VHF antenna

RTCM has a close working relationship with IEC. Once this RTCM EMC standard is completed, it will go to IEC TC80 as a new work item there. 406 MHz EPIRB standards have been handled the same way.
...
Forum: Marine Electronics 20-09-2021, 16:28
Replies: 62
Views: 7,408
Posted By joehersey
Re: Disputed interference between LED masthead light and VHF antenna

If you look at Annex C of EN60945 (actually IEC 60945), you see the emission limit that standard specifies for the band 156-165 MHz (24 dB µV/m at 9 kHz bandwidth, at 3m) is based upon the assumption...
Forum: Navigation 27-08-2021, 07:41
Replies: 95
Views: 9,325
Posted By joehersey
Re: How good a VHF watch do you maintain?

There's a good reason ITU required radios without an interconnected GPS to alarm every four hours. Earlier this year, the US Coast Guard reported to the International Maritime Organization that "The...
Forum: Navigation 27-08-2021, 07:22
Replies: 95
Views: 9,325
Posted By joehersey
Re: How good a VHF watch do you maintain?

For those that are interested, the US Coast Guard has information on US VHF watchkeeping requirements here: https://www.navcen.uscg.gov/?pageName=mtWatch
Forum: Marine Electronics 20-11-2020, 09:34
Replies: 2
Views: 576
Posted By joehersey
USCG Seeking Comments on Ceasing HF distress voice watch-keeping

USCG is seeking comments on discontinuing HF voice watchkeeping as announced in the attached Federal Register.** Since DSC-equipped radios are uncommon (I think only the Icom M802 has that...
Forum: Marine Electronics 22-10-2020, 16:20
Replies: 15
Views: 3,716
Posted By joehersey
Re: SeaTow Automated Radio Check Service Discontinued.

I believe you are quite right. What happened was that MariTEL and Seatow could not come to an agreement on the cost for continued use of the frequencies, once the original agreement expired. So...
Showing results 1 to 25 of 74
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