These are “Best of Tec Wrecks” aboard Red Sea Adventurer from 13 April  (£1279pp) and “Rocky & the ss Maidan” on blue Horizon from 31 August (£1549).

The trips will feature wrecks such as the Colona IV (pictured) and of course the Maidan and are said to be designed to cater for all levels from entry-level technical diving to depths of 100m-plus.

Back in the here and now, the “Worldwide Summer Sale” launched by blue o two, Master Liveaboards and the Siren Fleet continues, with claimed savings of more than £1000pp up for grabs on exotic liveaboard trips.

Destinations include French Polynesia (from £2561), Galapagos (£3410), Truk Lagoon (£1474), Palau (£2140), Fiji (£2035) and Indonesian (£2208) and Philippines (£1692) hotspots.

There are also group booking deals – book five spaces on Worldwide Summer Sale destinations (except Galapagos and some Truk holidays), and get a sixth free. Prices exclude flights.

www.blueotwo.com