Loading your revision module…
Marine Radio revision module 9 of 10
How VHF fits alongside EPIRB, PLB, SART, AIS, Navtex, and other distress or safety information systems.
10 guided lessons · 20 practice questions · 20 flashcards
Use this module hub to choose the right lesson, then open the dedicated lesson page for the complete explanation, worked examples, FAQs, and practice questions.
GMDSS Sea Area A1 is an area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available. Both parts matter: usable VHF radiotelepho...
Read the full lesson: GMDSS Sea Area A1An EPIRB is associated with a vessel. It sends a 406 MHz distress alert through the Cospas-Sarsat system towards a rescue coordination centre and provides an on-scene 121.5 MHz homing sig...
Read the full lesson: EPIRB, PLB, and SARTAIS can display reports such as identity, position, course and speed from suitably equipped stations. Data can be absent, delayed, entered incorrectly or attached to a target that is mano...
A distress system must first attract attention and identify the casualty. It must then support communication of the situation and assistance required, help rescuers locate people or survi...
Read the full lesson: Where VHF Fits GMDSSMCA MGN 665 Amendment 1 requires EPIRBs and 406 MHz PLBs fitted or carried on UK-registered ships, hovercraft and in-scope watercraft to be registered with the UK 406 MHz Beacon Registry....
Read the full lesson: EPIRB and PLB RegistrationA radar SART listens in the 9.2–9.5 GHz band and responds when interrogated by compatible radar. The response appears as a distinctive sequence that changes as the rescue unit closes. Hei...
Read the full lesson: SART and AIS LocatingMCA guidance for non-SOLAS vessels says the emergency source should power the radio distress and safety installation and the position source supplying it. That boundary is easy to miss: a...
Read the full lesson: Safety Information and RedundancyA1 is within VHF coast-station radiotelephone coverage with continuous DSC alerting. A2 is within MF coast-station radiotelephone coverage with continuous DSC alerting, excluding A1. A3 i...
Read the full lesson: GMDSS Sea Areas, SAR, and MSIB1 identifies the NAVTEX transmitter and therefore helps define the service area selected. B2 identifies the subject category. B3B4 is the NAVTEX serial number used by the receiver to sup...
Read the full lesson: NAVTEX Message IdentityInspect a float-free EPIRB for a clear release path, sound casing, readable hexadecimal identity, correct registration, battery and hydrostatic-release expiry dates, and its approved self...
Read the full lesson: EPIRB, SART, Survival VHFAdd the complete practice layer
Keep reading the public lesson articles, and add this module's guided flow, quizzes, spaced-repetition flashcards, progress, and mock exams with one payment.