Under GMDSS, a compulsory VHF-DSC radiotelephone installation must be tested at what minimum intervals at sea?

(D). Daily

47 CFR § 80.1107 Test of radiotelephone station. 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. Reference

From Marine Insights article on Daily, Monthly And Weekly Tests Of GMDSS Equipment On Board Ships

The VHF-Digital Selective Calling (DSC) installation must be tested at least once a day. The testing includes verification of connections, ability to generate radio propagation energy (power), and working of the display panel.

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Which statement concerning the testing of a compulsory radiotelephone station is FALSE?

(A). Calling the USCG on VHF CH-16 or 2182.0 kHz is the most effective method.

Normally, NO calling USCG, but there is an exclusion:

47 CFR 80.101(b) U.S. Coast Guard stations may be contacted on 2182 kHz or 156.800 MHz for test purposes only when tests are being conducted by Commission employees, when FCC-licensed technicians are conducting inspections on behalf of the Commission, when qualified technicians are installing or repairing radiotelephone equipment, or when qualified ship's personnel conduct an operational check requested by the U.S. Coast Guard. In these cases the test must be identified as “FCC” or “technical.”

The following is appropriate regarding to testing:

• Tests may be accomplished by using the equipment for normal business.

• A daily test is necessary unless the equipment was used for routine traffic.

• The test may not interfere with communications in progress and must wait or be suspended if a request to do so is made.

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While underway, how frequently is the DSC controller required to be tested?

(B). Once a day

47 CFR § 80.1107 Test of radiotelephone station. 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. Reference

From Marine Insights article on Daily, Monthly And Weekly Tests Of GMDSS Equipment On Board Ships

The VHF-Digital Selective Calling (DSC) installation must be tested at least once a day. The testing includes verification of connections, ability to generate radio propagation energy (power), and working of the display panel.

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At sea, all required equipment (other than Survival Craft Equipment) must be proven operational by:

(C). Daily testing or daily successful use of the equipment.

47 CFR § 80.1107 Test of radiotelephone station. 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. Reference

From Marine Insights article on Daily, Monthly And Weekly Tests Of GMDSS Equipment On Board Ships

The VHF-Digital Selective Calling (DSC) installation must be tested at least once a day. The testing includes verification of connections, ability to generate radio propagation energy (power), and working of the display panel.

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The best way to test the MF-HF SITOR (NBDP) system is:

(C). Initiate an ARQ call to a Coast Station and wait for the automatic exchange of answerbacks.

The ARQ, or the automatic retransmissions request, method was designed to overcome errors in transmission. If the transmission is not clear, an automatic resend of the message is requested.

For testing, ARQ process is to call and get a reply, from a Coast Station, and in actual transmission from another ship.

More on ARQ from ITU-R M.492-6 OPERATIONAL PROCEDURES FOR THE USE OF DIRECT-PRINTING TELEGRAPH EQUIPMENT IN THE MARITIME MOBILE SERVICE

Also solid info in pdf on Marine Handbook. Use Ctrl F and search for ARQ.

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The best way to test the Inmarsat-C terminal is:

(D). Compose and send a brief message to your own Inmarsat-C.

This appears to be a simple solution that does not interfere with radio wave traffic and provides feedback of the results.

Testing-related info on Code of Federal Regulations Title 47 Chapter I Subchapter D Part 80 Subpart C 47 CFR 80.101

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