47 CFR § 80.1107
Test of radiotelephone station
February 16, 2021
Unless the normal use of the required radiotelephone station demonstrates that the equipment is operating, a test communication on a required or working frequency must be made each day the ship is navigated. When this test is performed by a person other than the master and the equipment is found to be defective, the master must be promptly notified.
[76 FR 67617, Nov. 2, 2011]