ETO Navigation Electronics & GMDSS 3

Question 1

What is the international MF distress and calling frequency for voice communications?

Accepted Answer

2182 kHz

Answer

2182 kHz is the internationally designated medium frequency for voice distress and safety calling, historically maintained as a continuous watch frequency before GMDSS replaced older procedures.

Question 2

What is the primary purpose of two-way portable VHF radios carried as survival craft equipment under GMDSS?

Accepted Answer

To provide on-scene voice communication between survival craft and rescue units

Answer

Portable two-way VHF radios (survival craft equipment) enable communication between life rafts, lifeboats, and rescue vessels during abandonment and on-scene rescue operations.

Question 3

What is the correct format for a ship station MMSI number?

Accepted Answer

9-digit number whose first three digits are the Maritime Identification Digits (MID) representing the country

Answer

An MMSI is a 9-digit number where digits 1-3 are the Maritime Identification Digits (MID) assigned to the ship's flag state, enabling identification of the vessel's country of registration.

Question 4

For a vessel operating in GMDSS Sea Area A3, which additional equipment beyond A1/A2 requirements is mandatory?

Accepted Answer

An INMARSAT ship earth station or equivalent satellite communication system

Answer

Sea Area A3 (within INMARSAT geostationary satellite coverage, approximately 70N-70S) requires an INMARSAT ship earth station or equivalent approved satellite system for distress alerting.

Question 5

Under GMDSS regulations, how must the DSC watch on VHF Channel 70 be maintained while a vessel is at sea?

Accepted Answer

Continuously, 24 hours per day

Answer

SOLAS and GMDSS regulations mandate a continuous 24-hour automatic DSC watch on VHF Channel 70 to ensure distress alerts are never missed regardless of time of day.

ETO - Electro-Technical Officer Practice Test

ETO - Electro-Technical Officer Practice Test

ETO Navigation Electronics & GMDSS 3