33 CFR § 401.9 - Radio telephone and navigation equipment.
(b) The radio transmitters on a vessel shall:
(1) Have sufficient power output to enable the vessel to communicate with Seaway stations from a distance of 48 km; and
(2) Be fitted to operate from the conning position in the wheelhouse and to communicate on channels 11, 12, 13, 14, 15, 16, 17, 66a, 75, 76 and 77.
(c) Gyro compass error greater than 2 degrees must be serviced prior to transiting the Seaway, and if noted during a Seaway transit, it must be reported to the nearest Seaway station and the gyro compass must be serviced at the first opportunity.
(d) When magnetic compass error is greater than 5 degrees, the vessel is required to have the compass swung and a new deviation card produced, unless the “record of deviations” has been properly maintained and verified.