STCW Communication Systems 3

Question 1

What does 'watchkeeping' on VHF Channel 16 require of a vessel underway?

Accepted Answer

Continuously monitoring Channel 16 while at sea

Answer

SOLAS requires vessels underway to maintain a continuous watch on VHF Channel 16, the international distress and calling channel.

Question 2

What is the purpose of the Ship Security Alert System (SSAS)?

Accepted Answer

To transmit a covert security alert to authorities without alerting pirates or hijackers

Answer

SSAS sends a silent, covert alert to the ship's company security officer and flag state authorities without triggering any onboard alarm.

Question 3

In DSC (Digital Selective Calling), what category is used for transmitting a distress alert?

Accepted Answer

Distress

Answer

The Distress category in DSC is reserved exclusively for life-threatening emergencies requiring immediate assistance.

Question 4

What is a SART (Search and Rescue Transponder) designed to do?

Accepted Answer

Respond to radar pulses from searching vessels or aircraft to show a position on their radar screen

Answer

A SART responds to 9 GHz X-band radar pulses by generating a series of blips on the rescuer's radar display, indicating the survivor's position.

Question 5

Which MF/HF frequency is designated as the international distress frequency for radiotelephony?

Accepted Answer

2182 kHz

Answer

2182 kHz is the international MF distress and calling frequency for radiotelephony, used for voice mayday calls.

(STCW) Standards Certification and Watchkeeping for Seafarers Practice Test