Re: Asking for a radio check...
All of this seams trivial to me, however with 17 years military experience, proper radio etiquite is like second nature. It is not difficult to talk on a radio, just do not get nervous.
Always start your transmission with "You this is me". (ie. MarinaXXX, this is Pleaseure Boat Weekend Off, over). This identifies you and the calling station you are trying to raise. Also, by using "Over", you have indicated to everyone monitoring that you are expecting a reply.
Once radio contact has been established, continuing to use the call signs is not neccessary, but the use of "over" is until the conversation has ended, then use "out" when you end the last transmission of your call to indicate that there is no more traffic to follow and you are not expecting a response, the cnversation has ended...
For the Radio check to say the Coast guard, by transmission would sound like this: "Coast Guard Station Tybee, this is the Pleasure Boat Daddy's Daycare, radio check, over"
They could respond a couple of different ways:
"Daddy's Daycare, this is Coast Guard Station Tybee, Roger Out" (meaning they have acknowledge the check and read our transmission OK.
Or, depending on the radio operator, they could respond with:
"Daddy's Daycare, this is the Coast Guard Station Tybee, we read you Lima-Charlie, Out" (Lima-Charlie being the phonetic alphabet letters L and C to mean Loud and Clear.
The latter call is not REALLY proper etitiquite, but is commonly used by differing military personnel.
I hope this helps a little. Continue to ask if you want to know more or need clarification.