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Shearwater Tern (left) and Tern TX

Shearwater issues important notice for all Tern and Tern TX users.


The issue is that if using Air mode and the Nitrox mode gas has been programmed to something other than air (21%), then that programmed gas is used while diving. This could result in a less conservative dive plan than is appropriate.

Prevention: If using firmware v34, do not use single gas Air Mode. Instead, use the single gas Nitrox Mode with 21% gas programmed.

Updated firmware for Tern and Tern TX will be released Monday April 14, 2025. Please check our website for the newest version.

This study examined the space and resource use of great hammerheads off Andros Island, The Bahamas. Adult great hammerheads of both sexes were documented year-round. The scientists found evidence of site fidelity, with some individuals re-sighted or recaptured in the same locations (< 1 km) up to four years apart.

Why some great hammerhead sharks prefer to stick close to home

A study conducted around Andros Island in the Bahamas revealed that some individuals display remarkable site fidelity, choosing to stay close to home rather than embarking on extensive migrations.

IANTD and SEI Adopt “Powered By DAN” First Aid Programs

The International Association of Nitrox and Technical Divers (IANTD) and Scuba Educators International (SEI) have joined NAUI in embracing the Powered By DAN program. 

Through Powered By DAN, dive training agencies incorporate the skills and standards of DAN’s basic life support, CPR, oxygen administration, and other courses into their first aid training.

Emperor Group Launches New Brand – Emperor Adventure

Emperor Divers has launched an exciting new brand: Emperor Adventure – designed for thrill-seekers and nature lovers looking to explore the world in unforgettable ways.

Emperor Adventure offers expertly-curated outdoor experiences across the globe, from trekking and foraging through Indonesia’s lush jungles and hiking Egypt’s timeless deserts, to surfing the waves of the Maldives and swimming in the crystal-clear waters of the Indian Ocean and Red Sea.

Blue-lined octopus
Blue-lined octopus (A. Pollock / Public domain)

Male Octopuses Use Deadly Neurotoxin to Safely Mate

The blue-lined octopus (Hapalochlaena fasciata) is a fascinating species, known not only for its striking blue markings but also its venomous hunting and self-defence strategies. The neurotoxin it produces is called tetrodotoxin (TTX)  and it is incredibly potent—far more toxic than cyanide. 

Several European governments are warning citizens about travel to the United States following a string of high-profile cases in which American federal immigration authorities detained tourists.

Updated US Travel Restrictions and Advisories: Implications for Dive Travellers

Recent changes in US immigration enforcement have prompted updated travel advisories from Canada, Germany, Denmark and Finland. These nations have warned citizens of an increased risk of detention and secondary screening, particularly for members of the LGBTQ+ community and those with non-standard travel documentation.

Try Something New & Different!

Once upon a time, when we were drafting and tinkering with the design and editorial profile of this magazine before it was launched, I had already made the observation that American dive magazines focused predominantly on US dive sites, the Caribbean and some Pacific destinations, while European magazines were mainly centred on local dive sites, the Mediterranean and the Red Sea, with the occasional mention of the Maldives or Thailand.

Octopus Is Spotted Riding a Shark

The moment, captured on video by researchers from the Auckland University of Technology, has quickly attracted international attention.

While octopuses are known for their intelligence and problem-solving abilities, such behaviour is highly unusual. Researchers suggest the octopus may have been using the shark as cover, attempting to avoid predators or navigate more efficiently through the water. It is also possible the octopus was defending itself after an attempted predation by the shark.