ICOM Fixed DSC

Once you put in your MMSI number that is it. The difficulty comes if you want to delete or change it for any reason. At that time you will have to return to manufacturer or distributor for them to remove the MMSI for you. It is not usually a user possible thing to do.

I also have an Icom DSC (M505) and find it an excellent piece of kit now a problem has been sorted with my aerial.
 
You should not loose the MMSI is taken out of the boat.
There is an internal memory battery that is there to store such things.

Only a worry is the set is very old and as it is a DSC set thin is not likely.

Best regards
 
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