yeah, and your not supposed to say "portable" when using a handheld either 
but if, like many of us, you've listened to public safety for decades, you 
tend to say portable when using a handheld.
And, when using say the RV or cottage radio most people either don't say 
that they are portable at all, or they  say something about their secondary 
QTH in passing...allot of these old traditions made sense once, but not so 
much any more...this goes back to the days when you had to have separate 
certificates for each location you may have been operating from including 
mobile and portable meaning an alternate location from your home station for 
portable, and your vehicle when mobile.
Then this little thing called FM came along, and people started to use 
handheld radios and so the "portable" identification thing became a bit out 
of date.
I say portable when using my handheld because I don't have a secondary 
operating location so there is no confusion about the matter.
But, there are those on the local repeaters who will sternly correct my use 
of portible when using handheld as incorrect identification of my state of 
operation.  Which always makes me chuckle because I am actually operating 
through a fixed repeater station so technically I am not stationary at my 
home QTH, mobile or portable.
Anyway, marine mobile can indicate either landlocked or sea born mobile...I 
believe aeronotical mobile is a generic indication that you are operating 
the radio while flying.
There is actually a call sign prefix in Canada for maritime mobile stations 
operating permanently at sea...you cannot get such a call sign if you 
operate in a river or landlocked body of water.

73
Colin, V A6BKX


--------------------------------------------------
From: "Phil Scovell" <[log in to unmask]>
Sent: Monday, October 27, 2014 5:13 PM
To: <[log in to unmask]>
Subject: Re: Operating maritime mobile

> Don't quote me on this but I heard from some place years ago that unless 
> you
> are on an ocean, you are just mobile and not maritime mobile compared to
> being on a lake or river for example.  The same is true, I believe, with
> aeronautical mobile.  That means you are flying over an ocean.  Otherwise,
> flying over land, you are just air mobile or mobile period.  I don't know
> this for certain but I think the great lakes are calculated in miles 
> instead
> of nauts because they technically are not oceans.  I'd be curious if any 
> of
> this old memory is true or not.  I know rivers are measured and calculated
> in miles instead of nauts but as soon as they empty into the oceans, it
> changes to nauts instead of miles.
>
> Phil.
> K0NX