Re: VH radio check
Also, there is probably a non-emergency channel the the Coast Guard monitors in your area. I'm betting you could Goggle it, but what I did was just leave my radio in scan mode for awhile, after an hour or two I learned that here on Puget Sound they use 22A for non-emergency communication.
Probably best to use your radio as a scanner for a few days first anyway, to pick up "local knowledge". You will learn which channels are used by the local fisherman, marinas, etc.
You should identify yourself in all communications (I'm pretty sure this is a FCC requirement for all radio operators, it certainly is for Ham) at the beginning and end of a conversation. The VHF marine band does not require a radio operator's license in the USA, so AFAIK you are free to use a call sign of your own making. Convention for larger boats seems to be to use the vessel name (e.g MV Spokane). For my 14 foot skiff I just use the registration tag, pronounced phonetically, e.g. two seven one two november juliet (this is also what non-airline aircraft do).
For example, I would ask CG Puget Sound for a radio check on 22A by calling "Coast Guard Puget Sound, this is two seven one two november juliet, radio check please". After they respond I would say "this is two seven one two november juliet, thank you, out", or "this is two seven one two november juliet, thank you, good day" to make it clear I am done using the channel. Some minimalists might claim that the "this is" is superfluous and wastes bandwidth, but this doesn't seem to be as critical an issue as it is with aircraft.
Speak a little slower than normal, and if they respond that you are not clear, try adjusting your technique (e.g. move the mike a little closer or farther from your mouth) before changing h/w.
-dm