Sec. 80.304  Watch requirement during silence periods.

    (a) Each ship station operating on telegraphy frequencies in the 
band 405-535 kHz, must maintain a watch on the frequency 500 kHz of 
three minutes twice each hour beginning at x h.15 and x h.45 Coordinated 
Universal Time (UTC) by a licensed radiotelegraph officer using either a 
loudspeaker or headphone.
    (b) Each ship station operating on telephony on frequencies in the 
band 1605-3500 kHz must maintain a watch on the frequency 2182 kHz. This 
watch must be maintained at least twice each hour for 3 minutes 
commencing at x h.00 and x h.30 Coordinated Universal Time (UTC) using 
either a loudspeaker or headphone. Expect for distress, urgency or 
safety messages, ship stations must not transmit during the silence 
periods on 2182 kHz.