Diving into the abyss aboard Britain's world-leading submarine rescue system

Eleven years after 118 submariners met a grisly death at the bottom of the ocean in the Kursk, a British team has developed the most advanced underwater rescue system in the world. Andrew Preston watches them go into action

The British co-pilot of the rescue vehicle speaks slowly and deliberately into his microphone: ‘Lima, Lima, Lima.’

The signal is broadcast directly into the Mediterranean Sea via ‘underwater telephone’ using low frequency sound waves. The message is picked up in the control room of the Alrosa, a Russian submarine from the Black Sea fleet. The code words mean that the Nato rescue vehicle, known as Nemo, has successfully ‘mated’, or docked, with the Russian sub.

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