Code of Federal Regulations Title 47. Telecommunication § 47.80.301 Watch requirements

(a) Each public coast station licensed to operate in the band 1605–3500 kHz must monitor such frequency(s) as are used for working or, at the licensee's discretion, maintain a watch on 2182 kHz.

(b) Except for distress, urgency or safety messages, coast stations must not transmit on 2182 kHz during the silence periods for three minutes twice each hour beginning at x h.00 and x h.30 Coordinated Universal Time (UTC).

(c) Each public coast station must provide assistance for distress communications when requested by the Coast Guard.