Each cargo ship which in accordance with this part is equipped with a radiotelegraph station and which is not equipped with a radiotelegraph auto alarm, and each passenger ship required by this part to be equipped with a radiotelegraph station, shall, for safety purposes, carry at least two radio officers.

A cargo ship which in accordance with this part is equipped with a radiotelegraph station, which is equipped with a radiotelegraph auto alarm, shall, for safety purposes, carry at least one radio officer who shall have had at least six months’ previous service in the aggregate as a radio officer in a station on board a ship or ships of the United States.

Each ship of the United States which in accordance with this part is equipped with a radiotelegraph station shall, while being navigated in the open sea outside of a harbor or port, keep a continuous watch by means of radio officers whenever the station is not being used for authorized traffic: Provided, That, in lieu thereof, on a cargo ship equipped with a radiotelegraph auto alarm in proper operating condition, a watch of at least eight hours per day, in the aggregate, shall be maintained by means of a radio officer.

The Commission shall, when it finds it necessary for safety purposes, have authority to prescribe the particular hours of watch on a ship of the United States which in accordance with this part is equipped with a radiotelegraph station.

On all ships of the United States equipped with a radiotelegraph auto alarm, said apparatus shall be in operation at all times while the ship is being navigated in the open sea outside of a harbor or port when the radio officer is not on watch.

(June 19, 1934, ch. 652, title III, § 353, as added May 20, 1937, ch. 229, § 10(b), 50 Stat. 193; amended July 8, 1941, ch. 278, 55 Stat. 579; June 22, 1943, ch. 137, 57 Stat. 161; July 25, 1947, ch. 327, § 2(a), 61 Stat. 451; Aug. 13, 1954, ch. 729, § 1(d), 68 Stat. 705; Pub. L. 89–121, § 4, Aug. 13, 1965, 79 Stat. 513.)