Maritime Modes Question, Please

[BOBRR]

Hello,

Are these CG freq's am or fm, please:

150.725
162.
163.

And, are there any general rules, or customs, re modes
for Maritime related freq's ?

Thanks,
Bob

 

[RaleighGuy]

The freq u listed is not a federal channel, it's maritime. All your questions, about this and the Aero freqs you posted can be found in the RR wiki.

Marine VHF Channels - The RadioReference Wiki

wiki.radioreference.com

 

[hill]

VHF-FM marine is FM.

The frequencies you listed are part of the Coast Guard LMR radio network and are P25 digital with encryption used at times.