During Key Lock mode, you can adjust only the following controls:
•PTT switch
•Light/Lock key
•Volume
•Squelch
•1/2.5/5W (Only while pressing and holding PTT.)
If any other control is used, an error tone sounds.
To disable the keypad lock, press and hold LIGHT/LOCK for about 2 seconds or turn power off then on. KEYPAD UNLOCKED appears briefly on the VHF display only. The LOCKED display disappears.
Note: if the radio receives either a weather alert or decodes a severe weather S.A.M.E. code transmission, the keypad
automatically unlocks.
Manually Selecting Coast Guard/Distress/Hailing Channels
In addition to using Triple or DualWatch to monitor the Coast Guard/Distress/Hailing channels, you can manually select them at any time.
To select your Coast Guard/ Distress/Hailing channel, repeatedly press 16/9/TRI. At
the first press, the radio switches to Channel 16, the primary Coast Guard/Distress/Hailing channel. 16 appears on the screen. Press the key again to switch to Channel 9, the backup calling channel. 9 appears and NON COMMERCIAL appears at the bottom for USA channels. Press again to return to the standard marine channels.
Uniden MHS550 Radio Owner’s Manual | 45 |
