For underwater power cables, HVDC avoids the heavy currents required by the cable capacitance.

For underwater use, cameras, including video cameras can be provided with special housings that enables them to be used underwater.

For example, the Frog Suit allows the player to access underwater pipes, and the Tanooki Suit can temporarily transform Mario into an invincible statue, reducing the threat of damage.

For what was to be only the fourth ever EVA, underwater training was not undertaken, mostly because Collins just did not have the time.

For example, Kernavė has the oldest known medgrinda, a secret underwater road paved with wood.

For instance Macrocystis, a kelp of the order Laminariales, may reach 60 m in length, and forms prominent underwater forests.

For instance, Tennis, Rugby, Formula One, baseball, basketball, cricket, field hockey, football ( association, gridiron, rugby league and rugby union ), and ice hockey are spectator sports, while hunting or underwater hockey typically are not.

For commercial dry suit divers who must work on the sea bottom or on an underwater platform ( such as under an oil platform ), the dry suit may be fitted with heavy metal boots to keep the diver firmly weighted down.

For commercial divers or technical divers who may spend many hours in a dry suit underwater, it is not practical to have to climb back on board the ship in order to open a waterproof relief zipper and urinate.

For this new way of underwater diving, the Italian frogmen trained in La Spezia, Liguria, using the local Genoese newly diffused spearfishing free diving equipment ( diving mask, snorkel, swimfins, wetsuit ), the first specially made diving watch ( the luminescent Panerai ), and the new scuba unit.

For reasons stated in Anti-frogman techniques # Sending other frogmen against them, underwater fights between divers are much rarer in reality than in fiction, and thus suitability of the frogman's kit for " diver to diver combat " is less important than some other features when designing it ; but the point is considered here for completeness.

For these reasons divers find it difficult to determine the direction of sound underwater.

For example, the wings of penguins would be exaptational in the sense of serving a substantial new purpose ( underwater locomotion ), but might still be regarded as vestigial in the sense of having lost the function of flight.

For a long time, recreational underwater excursions were limited by the amount of breath that could be held.

For example, a particular sector effector may let a player fall through the floor if he walked over it and teleport him to another sector ; in practice, this could be used to create the effect of falling down a hole to a bigger room or creating a body of water that could be jumped into to explore underwater.

For those who dive underwater see: Category: Underwater divers.

For operations underwater they use other special gear.

For visiting scuba divers the attractions are steep underwater cliffs that drop away to 40 metres with abundant marine life.

For underwater use, it could be provided in cans instead.

For 10 years this ship completed numerous underwater pipe joints ( hyperbaric tie-ins ) and other maintenance work in and around the Shell operated Brent oilfield in the northern North Sea.

For this reason the Yeerks intended to create versions of Earth sharks with brains large enough to be infestable to serve as underwater shock troops on Leera, but their plan was foiled by the Animorphs.

For example in sonar, to send a sharp pulse of underwater sound towards a ship in the distance, simply transmitting that sharp pulse from every sonar projector in an array simultaneously fails because the ship will first hear the pulse from the speaker that happens to be nearest the ship, then later pulses from speakers that happen to be the further from the ship.

For underwater cave explorers, this can cause the optical illusion of air space in caverns.

For fifty-five years he had lived, progressing towards a no-goal, eating, working, breathing without plan, without reason.

For example, from the statements " if I'm breathing, then I'm alive " and " if I'm alive, then I'm breathing ", it can be inferred that " I'm breathing if and only if I'm alive ".

For example, if it's true that I'm breathing if and only if I'm alive, then it's true that if I'm breathing, I'm alive ; likewise, it's true that if I'm alive, I'm breathing.

For example, there is much better scientific evidence that breathing high-oxygen gases increase exercise tolerance, during aerobic exertion .< ref >

For, since there are four zones of the world in which we live, and four principal winds, while the church is scattered throughout all the world, and the “ pillar and ground ” of the church is the gospel and the spirit of life ; it is fitting that she should have four pillars, breathing out immortality on every side, and vivifying men afresh.

Cameron responded to these complaints, saying, " For every hour they spent trying to figure out what magazine to read, we spent an hour at the bottom of the tank breathing compressed air.

For normal breathing in cooler weather, they have large, multifolded nasal passages.

For those with asthma, taking other drugs, or subject to restraining techniques that restrict the breathing passages, there is a risk of death.

For the Kagyupa, in the context of mahāmudrā, mindfulness of breathing is thought to be the ideal way for the meditator to transition into taking the mind itself as the object of meditation and generating vipaśyanā on that basis.

For example, in addition to telling about the words spelled with the letters he sold, one of his skits talked about the uses of air — breathing, playing instruments, and blowing up balloons.

For penetration diving, a greater reserve of breathing gas should be allowed for, to ensure there is sufficient to get out of the wreck.

For extremely serious cases resulting from very deep dives, the treatment may require a chamber capable of a maximum pressure of, the equivalent of of water, and the ability to supply heliox as a breathing gas.

For example Austin presents evidence from EEG scans that deep relaxed breathing reduces brain activity.

For most surface orientated commercial diving where air is the breathing gas in use, this is no problem, as air is cheap and freely available.

: For fullface masks on breathing apparatus used out of water, see Self-contained breathing apparatus.

( For the same reason, many industrial breathing sets and a few scuba set have a mouthpiece with a strap that fastens behind the back of the neck.

For this reason, compressors must be carefully designed and maintained to ensure that no oil enters the breathing gas.

For breathing, this may include artificial respiration, often assisted by emergency oxygen.

For safest use, the concentration of anaesthetic vapour in the breathing attachment should be continuously monitored.