Uniden 250 - Manual (Page 15)

Triple Watch
Triple Watch mode monitors channels 16 and 9 for a signal while
you listen to the currently selected channel. The marine radio
checks channel 16 and 9 for activity every 2 seconds.
1 To select Triple Watch mode, press the
TRI button. TRIPLE appears on the dis-
play.
2 To exit from Triple Watch, press the TRI
button. TRIPLE disappears.
• While in Triple Watch mode, you can
change the currently selected channel
using the s or t button.
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