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Brighton Marina's main jetty is on the tilt, causing chaos for residents and shop owners. The Coastal Defenders team of diving engineers devise a cunning plan to fix the jetty in record time.

In Britain's biggest port, cargo grinds to a halt as a tugboat picks up a mystery object in its propeller. The Coastal Defenders dive team use everything at their disposal to try and free it.

The Coastal Defenders dive team face a long cold swim to inspect a vast oil tanker and respond to an emergency callout to repair a vital piece of equipment on a cargo ferry.

It’s a taste of the luxury life for the Coastal Defenders dive team as they fix the hull of a floating hotel.

A mooring structure called a dolphin has brought the Isle of Wight ferries to a standstill. The whole ferry terminal must move to allow the Coastal Defenders dive team to repair the seaworn structure.

It’s man versus mussel as the Coastal Defenders dive team clear shellfish from blocking a ship’s pipes.

It’s another emergency for the Coastal Defenders dive team when a ferry service ends up stranded.

The Coastal Defenders team face a graveyard of discarded boats which have to be cleared to protect the waterways.