GMDSS Flashcards
6 cards from real RYA SRC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 GMDSS flashcards as text
What does 'GMDSS' stand for?
Answer: Global Maritime Distress and Safety System
GMDSS stands for Global Maritime Distress and Safety System. It is an internationally agreed set of safety procedures, equipment, and communication protocols to increase safety at sea.
What is a 'Sea Area A1' in the GMDSS?
Answer: An area within range of at least one VHF coast station with continuous DSC alerting coverage
Sea Area A1 is defined as an area within range of at least one VHF coast station providing continuous DSC alerting coverage. In the UK, this covers most coastal waters out to approximately 30-40 nautical miles.
Which GMDSS equipment is required for vessels operating in Sea Area A1?
Answer: A VHF radio with DSC capability (Channel 70), plus a NAVTEX receiver and EPIRB or alternative alerting device
Sea Area A1 requires at minimum: a VHF DSC radio with Channel 70 watch receiver, means of receiving Maritime Safety Information (NAVTEX or Inmarsat), and a means of locating (SART or AIS-SART).
What is 'NAVTEX' and what does it provide?
Answer: A system for receiving navigational and meteorological warnings, forecasts, and urgent maritime safety information as text
NAVTEX is an automated system for receiving Maritime Safety Information (MSI) including navigational warnings, weather forecasts, and search and rescue information, printed as text on a dedicated receiver.
What is a SART and when would it be activated?
Answer: A Search and Rescue Transponder that produces a distinctive signal on radar screens to help rescue services locate survivors
A SART (Search and Rescue Transponder) is a radar transponder activated in a distress situation. When interrogated by a rescue vessel's radar, it produces a distinctive pattern of dots on the radar screen leading to the SART's position.
What is the primary purpose of the GMDSS?
Answer: To automate distress alerting and communication, ensuring rapid detection and coordination of search and rescue
GMDSS was designed to automate the distress alerting process, ensure that shore authorities and nearby vessels are alerted quickly, and facilitate coordinated search and rescue operations worldwide.
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Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- rya.org.uk — Score release, eligibility, fees, exam format, registration deadline, test delivery · verified Oct 2026