A radio built for the worst-case scenario
A survival craft VHF radio is stowed in a liferaft or similar survival craft, intended for use by survivors after a vessel has already been abandoned, which is a genuinely different design brief from any other handheld covered elsewhere in this catalogue. The Icom IC-GM1600 is built to exactly this brief, certified to IMO MSC.149(77), rated for over 8 hours of operation even at −20°C.
What IMO MSC.149(77) actually specifies
IMO Resolution MSC.149(77) is the performance standard for survival craft two-way VHF radiotelephone apparatus adopted under SOLAS, setting requirements covering operating temperature range, water and impact resistance, buoyancy, battery endurance and basic operational simplicity, since a survivor operating the radio may be under extreme stress, in poor light, wearing gloves or with cold, wet hands. This is a considerably more demanding specification than a standard commercial handheld is built or tested against.
Cold-weather performance
The IC-GM1600's rating for over 8 hours of operation at −20°C reflects a genuine, tested capability rather than a marketing figure, since a survival scenario is not guaranteed to occur in mild conditions, and a radio that fails or loses capacity in cold weather defeats its entire purpose at precisely the moment it matters most. Standard consumer and even many commercial handhelds are not tested or rated for this kind of sustained cold-weather endurance.
Simplicity as a safety feature
A survival craft radio's operational simplicity is itself part of what makes it fit for purpose: a survivor should not need to remember a complex sequence of button presses or menu navigation under the stress of an actual emergency. This is why survival craft radios are generally built around a minimal, purpose-specific control set rather than the extensive channel and feature list a general-purpose commercial handheld offers, trading flexibility for reliability under genuinely adverse conditions.
The IC-GM1600E: the MED variant
The IC-GM1600E meets MED 2014/90/EU "Wheel Mark" requirements alongside the same strict environmental performance for GMDSS use, covered in more depth in the dedicated Wheel Mark article elsewhere in this series, and adds a lithium battery pack with what Icom describes as superior low-temperature characteristics, alongside a large keypad designed for positive button action even with cold or gloved hands.
Where this fits a vessel's overall carriage requirement
Survival craft VHF radios are a required component of a SOLAS-compliant vessel's lifesaving appliance carriage, generally required in a specified quantity relative to the vessel's liferafts and survival craft, independent of the sea area the vessel is certified for. This is a separate carriage requirement from the vessel's primary bridge communication equipment, covered elsewhere in this series, and should be checked and stocked accordingly rather than assumed to be covered by the vessel's other GMDSS radios.
What to confirm when specifying survival craft radios
- The exact quantity required for your vessel's specific liferaft and survival craft complement, confirmed against classification society and flag state requirements.
- MED Wheel Mark certification specifically where the vessel's flag or trading routes require it, as covered in more depth elsewhere in this series.
- Battery replacement and service intervals, since these radios sit stowed and largely unused for long periods and depend on being genuinely ready when needed.
ASPL supplies IMO MSC.149(77) certified survival craft radios for commercial vessels and fishing fleets in India, and can confirm the required quantity and specification for a specific vessel's lifesaving appliance fit.