47 CFR 80.304 - Watch requirement during silence periods.
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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. Except for distress, urgency or safety messages, ship stations must not transmit during the silence periods on 2182 kHz.
[69 FR 64673, Nov. 8, 2004]
Title 47 published on 2013-10-01
no entries appear in the Federal Register after this date.