Originally Posted by boatman61
True but... if I did it under eg; my own boats name then only used it on boats with no AIS..??
Is that a problem..
The unit Atoll came up with.. seen loads of sailboats with little or no info other than a name.. often its just 'sailing vessel'
It's a problem of misidentification rather than a problem of not having AIS.
Imagine you already have a receive-only AIS-equipped VHF, like my Standard Horizon GX2200. Assume you have an MMSI that identifies that unit as belonging to "S/V Boatman Phil", an eight metre bilge
keeler from Gosport.
This only matters if you need to make a DSC
call to some other vessel in the middle of the Atlantic on your 12 metre delivery
. Even then, you can explain, if needed, why you seem bigger in real life...
But if you do not make that DSC
call, you get the benefits (even with a simple "emergency antenna" of the "Signal Mate" kind in the back of the VHF) of AIS, which are a sort of watchkeeping/CPA/TCPA facility without actually making your vagrant MMSI known. If you see the possibility of collision, you can call 12 or 16; if you need to do Ch. 70 because things are getting tight, you can use a DSC-equipped handheld, which is allowed, nay, expected to "roam". And if you absolutely must call DSC on your own base VHF, you are in "emergency" mode and all is forgiven under COLREGS, no?
I have just a flat two-foot whip in the back of my VHF inside a steel
pilothouse and regularly get 10 NM AIS contacts from my dock
If I bothered to put a tuned AIS fibreglass whip on the rail leading to the base unit, I'm sure I would do much better.