Scuba

Nitrox is just oxygen enriched air.

If you used pure oxygen, it would be toxic past a depth of 20 feet / 6 meters.

Pool noodles are made of a non-biodegradable material. As such, they would be bad for the environment if left in the environment. This is the same for almost any litter not properly disposed of.

from holding their breath and ascending.

This is because you dive, and because of Boyle's and Gay-Lussac's law, your blood basically takes in the nitrogen gas like carbonated water. Boyle's law causes gases to have impartial pressures, and so you would absorb oxygen instead of nitrogen because of the impartial pressures of gases.

Compressed air used for SCUBA should smell like regular air. There may be a slight rubber smell from the regulator. When in doubt, it is safer to get your tank refilled than to dive on contaminated air.

A red flag with a diagonal white stripe

free diving is where a group or one person goes into the sea and dives; without a oxygen tank. they then proceed to go as far down as they can and the one who goes the furthest down wins. free divers are required to have a good lung capacity and as healthy body, it is advised NOT to try this, free divers are proffesionals and have had many years of training. Many risks can be taken for example; too much pressure on your heart and body causing breakages, heart attacks and of course drowning. It is advised that you have a doctor or someone with a medical qualification to be present at events to ensure the safety of free divers.

It stands for Self Contained Underwater Breathing Apparatus.

There isn't one that I know of, and I just finished a course in diving. YOu have to be able to swim and to get gear that fits you, other than that, I don't think that there are any limitations.

Remove transmitter from regulator by unscrewing it.

Unscrew the four screws at the base of the unit.

Pop out dead battery.

Insert new battery.

Replace o-ring.

Put four screws back in to the base plate. Be careful not to overtighten.

Replace transmitter on regulator first stage.

they use an air tank they put a mouth piece in there mouth and breath through it i know this because i went diving before oh and one last thing you have to keep an eye on how much air you have

Scuba diving, as the equipment is so expensive, and it is expensive getting to a given location, from a boat, to dive. It's the 2nd most expensive fun (behind skydiving) you'll ever have.

It is any illness that is related to a release of pressure from the body such as barotrauma .. baro (pressure) trauma (injury). It includes decompression sickness, but it is not limited to decompression sickness. It is also not limited to diving even though that is what is mostly thought of when discussing decompression illness or DCI.

Whatever you take it to mean.Weather that is following up on it, taking a certification, and buying your own equipment. Take it like you see it, and go that path(; Good luck

People have dived to the wreck, but as it sits in 400ft of water it's not for the recreational diver.

You also need special permission from the Greek government as it is a war grave.

As long as he wants if he has enough gas to do the required decompression. But if you are asking what the no-stop time limit is, it doesn't exists since any dive to 100 meters (328 feet) requires mandatory decompression.

It is hard to put an exact date on this because it was probably top secret. Being under water is covert and many submarine war devices were considered 'unsporting' or at the very least you wouldn't let people know you were employing such nefarious devices. Submersible designs intended for military applications date to the 1620 but it was probably in 1808 when Sieur, who was in the Napoleonic Navy created the first re-breather that military applications were considered using what you might call scuba. in 1900 re-breathers were mass produced for submarine escape and the availability of these units meant they were used widely from then for spear-fishing etc. 'Frogmen' from various countries used re-breathers in the second world war extensively for covert operations planting mines and overcoming submarine defences.

underwater

you don't EVER turn off ANY dive computer.... they will turn themselves off when they have completed their calculations (ie: 24 hours to fly after last dive).

1 newton.

Pure oxygen is toxic, especially at high pressures. Nitrogen is also toxic at high pressures and so is replaced with helium, which is completely inert.

A typical diver watch is water resistant in depths of about 200 - 300 meters. Diver watches are made of high grade materials able to withstand the change in atmospheric pressure under water and with proper care can easily be used in salt water and fresh water applications.

No Specialized gear is needed to dive to the depths where the Lusitania rests.

At 450 feet the wreck is not available to sport divers.

A semi dry suit is one which is usually made of neoprene. It actually lets waterin so you will initially feel cold but because the neck and wrist seals are quite tight, the water flow is restricted so your body heat will warm up the water. ot sure why they call it a semi dry mind you, you syill get wet! A dry suit has rubbber seals which don't let water in in the first place. I prefer to dive on a dry suit because the diving I do is usually in cold water. A semi dry is perhaps best used in temperatures of 13-20C. Each person is different so will feel the heat differently. You can also get different thicknesses of a semi dry suit so you should pick one for the type of diving you do. I think they usually come in as 3mm, 5mm, 7mm. Obviously, the thicker it is, the warmer you will be. Some people however don't like the thicker ones as they find it restircts movement a little. This is why I prefer a dry suit since the suit itself is just a membrance but I cano alter how much I wear underneath depending on the water temperature.

Hope this helps. If not, drop me a message!