The remote atoll in the Marshall Islands is where the USA tested the effects of atomic bombs on  battleships, submarines, destroyers and the famed USS Saratoga aircraft-carrier after WW2.

It reopened to divers in 1996 but has been little-dived in recent years.

The wrecks are not only historic but well-populated with marine life, and most sit at 50m or more, so this trip is for technical divers only.

Truk Master, which carries its own hyperbaric chamber, will take no more than 11 guests the 215 miles from Kwajalein. All divers must be technically qualified and will be able to do at least two dives a day.

Durations are 10, 11 and 14 nights, and the first 11-night trip is on 16 June next year and costs £5368pp excluding flights.

Bookings are being taken for 2019 and 2020, and because such trips are few and far between and places limited, they are likely to fill up fast.

www.blueotwo.com