You can you survive 47 metres underwater but to do so you need to have the necessary training and experience as a scuba diver. To survive a deep dive to 47 metres down you must follow decompression stop limits or carry out decompression stops on your ascent to avoid getting decompression sickness.

No, you cannot scuba dive to the Titanic. The Titanic lies in 12,500 feet of ice cold Atlantic ocean and the maximum depth a human can scuba dive is between 400 to 1000 feet because of water pressure.

Human bone crushes at about 11159 kg per square inch. This means we’d have to dive to about 35.5 km depth before bone crushes. This is three times as deep as the deepest point in our ocean.

Scuba divers roll off boats backwards so as not to dislodge their facemask or regulator (the thing they breathe through). Because if they fell the other way they would fall into the boat.

35,858 feet

122m

Yes, sharks do attack divers, whether provoked or unprovoked. However, attacks are extremely rare, as sharks don’t view scuba divers as a particularly appetizing prey. Most sharks are cautious of divers although, over the years, sharks have become bolder around people because of baiting. …

Any bodily fluid released into the water is likely detectable by sharks. A shark’s sense of smell is powerful – it allows them to find prey from hundreds of yards away. Menstrual blood in the water could be detected by a shark, just like any urine or other bodily fluids.

“We do know that sharks don’t like to eat people,” he said. “Studies show they respond strongly to the smell of seals and fish, but not humans. The trouble with sharks is that they are inquisitive and when checking out a potential prey item they typically come up and have a nibble.

The most common reason is likely to be that they get confused. Surfers or swimmers are mistaken for more natural prey such as seals, which spend a lot of time on the surface. The chances are the shark just takes a single bite then realizes its mistake.

Every year approximately 100 people die in North America while diving, and another 100 die while diving in the rest of the world. Diving is a relatively high ‘risk’ activity. By that I mean there are many ways in which you can be injured while diving and many of these situations result in death.

Wetsuits are black mainly due to UV resistance and the low cost of coloring neoprene. Yet, the color black holds many inherent benefits, making it the optimal choice for any wetsuit. From keeping you warmer to withstanding sustained exposure to the elements, wetsuits are primarily black for a range of reasons.

Great white sharks are often thought of as the most fearsome predators in the ocean. But even these sharks are afraid of something. A new study found that when great whites have encountered killer whales, or orcas, near their hunting grounds, they’ve fled and stayed away.

Consuming sharks will increase the level of mercury you ingest which will in turn increase your risk of neurological disorders, autism, infertility, Coronary heart disease or even death. Sharks regulate the behaviour of prey species, and prevent them from over-grazing vital habitats.

“We do know that dolphins will attack and kill small sharks,” he says, adding that they will also kill other large fish and small porpoises that pose no immediate threat. They don’t usually eat these victims though, and the altercations often happen when the dolphins appear to be socializing.

Dolphins have been found to bludgeon porpoises to death by the hundreds. Unlike most animal killers, which eat their prey, dolphins seem to have murderous urges unrelated to the need for food. They have even been observed in recurring acts of infanticide.

Still, sharks have more to fear from humans than we do of them. Humans hunt sharks for their meat, internal organs, skin, and fins in order to make products such as shark fin soup, lubricants, and leather.