RYA SRC Maritime Safety Information & NAVTEX

Question 1

What does the abbreviation MSI stand for in the context of maritime communications?

Accepted Answer

Maritime Safety Information

Answer

MSI stands for Maritime Safety Information — the collective term for navigational warnings, meteorological warnings, weather forecasts, and other urgent safety messages broadcast to mariners as part of the GMDSS.

Question 2

On what frequency does NAVTEX broadcast international Maritime Safety Information in English?

Accepted Answer

518 kHz (medium frequency)

Answer

NAVTEX broadcasts international MSI in English on 518 kHz in the medium frequency (MF) band. A separate frequency of 490 kHz is used for national-language broadcasts. NAVTEX is entirely separate from VHF radio communications.

Question 3

What is the primary operational advantage of a dedicated NAVTEX receiver on board?

Accepted Answer

It automatically receives and stores MSI messages without a radio operator needing to listen continuously

Answer

A NAVTEX receiver monitors its dedicated frequency automatically and prints or displays incoming MSI messages — navigational warnings, weather forecasts, and safety notices — without requiring a radio operator to be present or actively listening. This is especially valuable for short-handed crews.

Question 4

In the UK, which organisation is primarily responsible for coordinating the broadcast of Maritime Safety Information to small craft on VHF?

Accepted Answer

HM Coastguard (HMCG)

Answer

HM Coastguard (HMCG), which is part of the Maritime and Coastguard Agency (MCA), is responsible for coordinating and broadcasting MSI to mariners in UK waters, including weather forecasts, navigational warnings, and urgent safety notices on VHF.

Question 5

On which VHF channel does HM Coastguard broadcast routine weather forecasts and navigational warnings for small craft in UK waters?

Accepted Answer

Channel 67

Answer

HM Coastguard broadcasts routine small craft weather forecasts and navigational warnings on Channel 67, which is designated as the UK Small Craft Safety channel. Broadcasts are announced on Channel 16 first, after which mariners switch to Channel 67 to receive the information.

RYA SRC Practice Test

RYA SRC Practice Test

RYA SRC Maritime Safety Information & NAVTEX