Scuba

Scuba divers are typically loaded down with quite a bit of heavy gear. The Avelo System is designed to help in that regard, as it moves the functionality of the buoyancy compensator into the air tank, making the former unnecessary.

When it comes to communicating with one another while underwater, scuba divers typically use either hand signals or writing boards … both of which have limitations. Soon, however, they could be utilizing an app on their existing smartphone.

Not content with boasting the world's tallest building, the world's largest mall and a host of other forward-thinking ventures that include flying taxis and firefighters with jetpacks, Dubai has now opened the deepest swimming pool in the world.

There are already devices that allow smartphones to double either as dive computers, or as underwater cameras. The currently crowdfunding HotDive, however, does both.

If you're on a secret military diving mission, chances are you don't want the enemy to see you getting into the water. That's where VICTA comes in, as it's a diver delivery boat that transforms into a submarine.

Back in 2017, Chinese startup Sublue successfully crowdfunded an underwater scooter known as the WhiteShark Mix. The company is now set to release a new-and-improved model, called the Mix Pro.

Although many scuba divers utilize wearable computers to track dive stats, those devices can't record an actual map of the underwater route that the user travelled. The newly-developed Brizo, however, is claimed to do exactly that.

Surface-supplied diving systems find balance between snorkelling and scuba by strapping you to an air supply floating atop the water. Typically these systems rely on compressed air, but the ExoLung uses a more sustainable air supply: you.

Although we've seen a number of personal underwater propulsion devices in recent years, the Scubajet was one of the first. Its designers have now announced a Pro model, that reportedly dives deeper, runs longer, and features a dual-hand controller.

Back in 2017, French startup Thalatoo announced the Maoi, a scuba mask-mounted head-up display (HUD) dive computer. Well, a bigger name is now throwing its hat in the ring, as California-based Scubapro has released its own product – it's called the Galileo HUD Mask-Mounted Dive Computer.

As any scuba diver knows, communicating while underwater is difficult. Although it's possible to use hand signals, you still have to get other divers' attention so that they see those signals. The Oceans S1 Supersonic dive computer is made to address that problem, using an ultrasonic comms system.

​Since at least 2004, surfers, swimmers and scuba divers have been able to buy an electronic shark-deterrent device known as the Shark Shield. Its patented technology is now being offered in a handheld speargun-like gadget, called the eSpear.