1965—Pub. L. 89–121, among other changes, substituted wherever appearing “radiotelegraph station” for “radiotelegraph installation”, “radiotelegraph auto alarm” for “auto-alarm”, and “radio officer” and “radio officers” for “qualified operator” and “qualified operators”, required a continuous watch to be kept when the radiotelegraph station is not being used for authorized traffic, and inserted “while being navigated in the open sea” in two places.

1954—Act Aug. 13, 1954, amended section to make clear that it applies only to ships equipped with a radiotelegraph installation, not those fitted with a radiotelephone installation.

1943—Subsec. (b). Act June 22, 1943, substituted “the termination of such emergency or such earlier date as Congress by concurrent resolution may designate” for “June 30, 1943”.

1941—Subsec. (b). Act July 8, 1941, inserted exception respecting national emergency.

Acts July 8, 1941, and June 22, 1943, which amended subsec. (b) of this section by adding the clause authorizing suspension or modification of the service requirement during the emergency, were repealed, effective July 1, 1948, by act July 25, 1947, which provided that such acts should remain in full force and effect until such date.

Section effective May 20, 1937, unless deferred by the Commission, see section 16 of act May 20, 1937, set out as a note under section 351 of this title.

Act Dec. 17, 1941, ch. 588, 55 Stat. 808, as amended June 28, 1943, ch. 174, 57 Stat. 244; June 13, 1945, ch. 190, 59 Stat. 259; 1946 Reorg. Plan No. 3, § 101, eff. July 16, 1946, 11 F.R. 7875, 60 Stat. 1097, prohibiting employment of radio operators who were disapproved by the Secretary of the Navy during World War II, was repealed by act July 25, 1947, ch. 327, § 1, 61 Stat. 449.