Another photo of the radio room on the London Majesty, call sign GPZJ, taken in the Summer of 1964. Shown L-R are the main receiver, the emergency transmitter, the distress auto key and the corner of the radio direction finder. The auto key was an electro mechanical device that in the event of a distress could be switched on to automatically and repeatedly send out SOS SOS SOS de (from) GPZJ GPZJ GPZJ followed by a long dash so that other vessels could take a direction finder bearing on her.