Locating a diver on the surface can be surprisingly difficult. I know, because I have been at both the searching and searched-for ends of this scenario. Even with surface signaling devices, locating a tiny, floating head amidst uneven chop can be difficult; without them it may be impossible. In an ideal world, divers would never be separated from their boats or buddies, but the ocean can be unpredictable, and freak currents and mistakes occur. Hopefully you will never find yourself lost a sea, but it's still a good idea to carry surface signaling devices on every dive -- just in case. Here are five devices that can make finding a diver on the surface easier.
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Rich cold-water coral reef in the Whittard Canyon area by the Isis ROV
The UK’s National Oceanography Centre has produced the first true three-dimensional picture of submarine canyon habitats, using a unique combination of marine robotics and ship-based measurements. The information captured in this new set of maps ranges in scale from the 200 km canyon down to the size of an individual cold-water coral polyp, and will be used to inform the management of the only English deep water marine conservation zone.
Crown of thorns starfish, COTSScientists in Australia have discovered that vinegar kills Crown-of-Thorns Starfish just as effectively as the current drug, which can be expensive and difficult to source.
Outbreaks of the venomous Crown-of-Thorns Starfish (Acanthaster planci) pose one of the most significant threats to the Great Barrier Reef.
Concern is growing that human-generated noise in the ocean disrupts marine animals that rely on sound for communication and navigation. In the modern ocean, the background noise can be ten times louder than it was just 50 years ago. But new modeling based on recently published data suggests that 200 years ago — prior to the industrial whaling era — the ocean was even louder than today due to the various sounds whales make.
For the first time in over a century, you can actually see the original surface of the world’s first successful combat submarine. Until recently, the Hunley was completely encased in concretion, an encrusted layer of sand, sediment and shells that built up slowly over time while she was lost at sea.
