Did (or maybe do) passenger transatlantic or transpacific aircraft (I'm thinking of typical a/c flown by major carriers) carry portable radio equipment to operate in a liferaft should the aircraft alight on water? In particular in the 1990's
From my username you may guess (correctly) that I come from a nautical background. Passenger (and cargo) ships prior to GMDSS (Global Maritime Distress and Safety System) carried portable lifeboat/liferaft radio equipment. This had handles for the operator, or his/her helper, to generate power to operate the transceiver on the appropriate frequencies. (I say appropriate, as I don't want to put frequencies into the minds of anyone who may reply. What I particularly want to know are the frequency/frequencies that civil passenger (or maybe cargo) aircraft emergency radio equipment operated on. Also the mode of transmission. Nautical equipment sent a SOS message in Morse code also manually by Morse key (that would have been my job) or by radio telephone.
Sorry for a somewhat vague question, but I'm putting together a query to the UK CAA and need some ammo.
Besides frequencies and modes, type numbers would be useful.
In the back of my mind I seem to remember seeing a plaque advising of location of emergency radio on either a KLM or BA a/c.
I would expect at the present time that any equipment carried would likely be for reception/relay by satellite on 121.5, 406MHz etc. I'm looking for terrestrial radio MF/HF.
PPL with HF RTF