B&G H50 Wireless VHF Handset - Manual (Page 20)

5 Setup your radio - Your user MMSI
CAUTION
You can’t make any DSC transmissions until you’ve obtained a user MMSI and entered
it into your radio.
You must enter your User MMSI before the DSC functions of this radio will work.
See the Setup section in the V50 User Guide for full setup details.
CAUTION
Under extreme operating conditions, the temperature of the rear heat-sink
on this radio may exceed normal surface temperatures.
Caution is advised to prevent possible skin burns.
B&G - V50 & H50 Installation Instructions 20