alan tani @ alantani.com fishing reel repair rebuild tutorial MMSI, DSC, AIS
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Author Topic: MMSI, DSC, AIS  (Read 856 times)
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Gobi King
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« on: January 09, 2019, 03:13:48 PM »

I have a small 17 ft alu boat.

I have been competing in the biggest Gobi contests for many years and now I want to graduate and participate in a few of the walleye tournaments.

The walleye guys require boats to have Marine Radio.

Well, I bought a few Standard Horizon units:
1. HX870 - GPS DSC handheld (floating)
2. HX210 (floating)
3. GX1700 (GPS DSC static unit)

. I want to cover safety in the spring months after ice out when I go out on the big lake or on Detroit River (shipping channel)

Here are my questions (please pardon newbie my lack of knowledge in this area)

1. I have 1 handheld GPS/DSC unit and a fixed boat unit with DSC, do I need to get 2 MMSI #s?
2. Do I need to add in AIS class b?
3. ACR unit, do I need one? I will around 8 miles off shore max.

Anything I should be thinking of?

« Last Edit: January 09, 2019, 04:08:43 PM by Gobi King » Logged

Shibs - aka The Gobi King
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David Hall
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« Reply #1 on: March 27, 2019, 11:54:47 AM »

one MMSI number can be used for both devices. I believe it is vessel specific.
AIS is a nice safety feature, I have vesper XB8000 on my boat and glad I do, I came into my harbor in fog so heavy visibility was a mere 50' that is less than 2 boat lengths,  I could see a vessel in the channel and my AIS told me who it was, I slowed to idle speed and when I made visual contact it was a whale watching boat 50' in front of me and they were backing down to give me room to get into the channel.  they had seen me on their AIS and I saw them on mine and it was a simple passing at the jaws instead of a collision.
just so you know, I will always vote yes for anything that adds another level of safety on the sea. 
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Gobi King
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« Reply #2 on: March 27, 2019, 06:28:58 PM »

David,
Thanks,
I spoke to the coast guard guys at the fishing show last weekend and they said I should get unique MMSI for each.
The guys at the walleye club concur with you and said one will do.

If it is tied to a vessel then, 1 # makes sense,
If it is tied to the person then, 2#, one for fixed unit and one for the handheld makes sense.

If I get a unique #for the handHeld, can I use it on my smaller boat? i.e. the handheld unit, can it be independent of the vessel?

Vesper - it has wifi feature and can connect to WIFE devices, does that mean you can watch AIS display on a PDA device? If that is yes, then that is neat,

It does get foggy quite a few times a year here to, most of the launches are on an access lake and we have to take a shipping channel out to the big lake, big lake barges and other big lake monsters which  are 1000 ft long, yes 1000 ft.

So I am sold on AIS, I need to figure out how to mount all these antennas and keep a cover on as I want to slip my boat for a few months. I spoke to a custom arch outfit. There were local in Traverse City but has since moved to Toledo, They can fab me an arch which would weigh 65 lbs.

I need to get cracking on this after I get the boat out of storage.

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Shibs - aka The Gobi King
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Ron Jones
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« Reply #3 on: March 27, 2019, 06:38:35 PM »

As someone who spent their whole life popping up in the middle of the ocean without really knowing what was going on around me, I cannot sell AIS enough. Best form of cheating there is. In all honesty, I'd rather have it than RADAR. The MMSI goes with the device, nothing to do with the vessel.

We have had GPS/AIS interference in the past. I know their isn't much room on a 17 ft boat, but separate them as much as possible. Also, height is WAY more important for AIS, which is line of sight, than GPS. If your separation includes height put the AIS antennae up high.

Ron Jones
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Ronald Jones
To those who have gone to sea and returned and to those who have gone to sea and will never return
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David Hall
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« Reply #4 on: March 29, 2019, 10:38:15 AM »

my vesper AIS unit runs off my regular VHF antennae, through a special splitter and feeds into NMEA2000 so I only use one antennae, also the vesper feeds GPS data to my MFD so I also use only one GPS antennae.  And yes it is capable of acting as a wifi hub,I do not use it that way but I have an app called Marine traffic on my phone and Ipad.  It shows real time data such as location, heading, speed as well as historical data for the day, what time I left the harbor, Speed and heading and course. 
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