Some home made rebreather were used by cave divers to penetrate cave sumps.

Some rebreather divers breathe from the loop for 2 or 3 minutes before entering the water, to check that the soda lime of the carbon dioxide scrubber is active.

Some rebreather divers fit backplates to their rebreathers.

Some of these may carry pure oxygen for accelerated decompression or as a component of a rebreather.

Some divers may find pike easier in a flip than tuck, and most find straight the easiest in a front / back dive, although it is still rated the most difficult because of the risk of overrotation.

' I am she that is the natural mother of all things, mistress and governess of all the elements, the initial progeny of worlds, chief of powers divine, Queen of heaven, the principal of the Gods celestial, the light of the goddesses: at my will the planets of the air, the wholesome winds of the Seas, and the silences of hell be disposed ; my name, my divinity is adored throughout all the world in divers manners, in variable customs and in many names, [...] Some call me Juno, others Bellona of the Battles, and still others Hecate.

Some divers will store it in a BC pocket, but this reduces availability in an emergency.

Some divers use nitrox, which usually has a higher percentage of oxygen, often 32 % or 36 % in EAN32 and EAN36, respectively.

Some divers instead connect their backup regulator to a smaller " pony cylinder " for extra safety, and there are also emergency systems which mount a simple regulator directly to the top of a small cylinder.

Some diver training organizations and groups of divers teach techniques, such as DIR diving for configuring diving equipment.

Some divers suffer from hyperbaric arthralgia during descent.

The most impressive diving exhibited by shearwaters is found in the Short-tailed Shearwater, which has been recorded diving below 70 m. Some albatross species are also capable of some limited diving, with Light-mantled Sooty Albatrosses holding the record at 12 m. Of all the wing-propelled pursuit divers, the most efficient in the air are the albatrosses, and it is no coincidence that they are the poorest divers.

Some plunge divers ( as well as some surface feeders ) are dependent on dolphins and tuna to push shoaling fish up towards the surface.

Some divers collect aluminum cans, which they can then sell for a small profit.

< center > Some remoras, such as this Echeneis naucrates, may attach themselves to scuba divers.

Some consider a dry suit mandatory ; however, a thick wetsuit may be sufficient for hardier divers.

Some precautions and skills for night diving include: avoiding shining your light in other divers ' eyes, to be aware of and use surface light signals for bearings, or similarly use a surface marker buoy with an attached strobe or cyalume stick.

Some commercial divers order their suits without boots and install rubber work boots such as those used by miners or firefighters.

Some divers ensure that the bubble remains at the top of their body by using the buoyancy compensator to counteract any excess weighting, keeping only the minimum gas necessary to avoid squeeze inside the drysuit.

Some British armed forces divers used bulky thick diving suits called Sladen suits ; one version of it had a flip-up single faceplate for both eyes to let the user get binoculars to his eyes when on the surface.

Some countries ' frogman organizations include a translation of the word " frogman " in their official names, e. g. Denmark's Frømandskorpset and Norway's Froskemanskorpset ; others call themselves " combat divers " or similar.

Some especially hardy midwestern and north central SCUBA divers go spearfishing under the ice in the winter when water clarity is at its best.

Some divers wear a dive skin under a wetsuit, which allows easier donning and ( for those who experience skin problems from neoprene ) provides additional comfort.

Some divers can put on their own helmet, but it is usual for the topside crew to do most of the locking on to the neck dam, and check that there are no obvious faults with the seal.

Some divers prefer negatively buoyant fins.

Some of the first training started in 1952 at the Scripps Institution of Oceanography where Andy Rechnitzer, Bob Dill and Connie Limbaugh taught the first scuba courses in the United States, then in 1953 Trevor Hampton created the first British diving school, the British Underwater Centre and in 1954 when Los Angeles County created an Underwater Instructor Certification Course based on the training that they received from the scientific divers of the Scripps Institution of Oceanography.

Some people have luck and some have no luck and that, whatever people who prefer order say, is the size of it.

" Some prefer " America the Beautiful " over " The Star-Spangled Banner " due to the latter's war-oriented imagery.

Some bicycle parts, particularly hub-based gearing systems, are complex, and many cyclists prefer to leave maintenance and repairs to professional bicycle mechanics.

Some but not most Baptists prefer not to be called Protestants, claiming a direct ancestral line going back to the apostles in the 1st century.

Some doubt whether there is a unified cognitive science and prefer to speak of the cognitive sciences in plural.

Some authors of technical documents may prefer either mouse devices or the more generic pointing devices.

Some academics prefer to transliterate the term as Khalīfah.

Some dancers prefer to hold the arms much lower, similar to conventional ballroom positioning.

Some consumers prefer the taste of soda manufactured with sugar.

Some people also prefer to have the information on their tags transferred to a smaller, sometimes golden or silver tag by a jeweler, as the original tag can be considered too large and bulky by some.

Some forms of synthesis, like, for instance, sampling and additive synthesis are not feasible in analog synthesizers, while on the other hand, many musicians prefer the character of analog synthesizers over their digital equivalent.

Some prefer the Wade-based Taoism because it is more familiar than Daoism and because the borrowing is a fully assimilated English word anyway ; such words are generally unaffected by later systems of romanization.

Some theorists prefer to stick to Euclidean space and say that there is no dual.

Some Protestants prefer to call it an ordinance, viewing it not as a specific channel of divine grace but as an expression of faith and of obedience to Christ.

Some aficionados who prefer class-A amplifiers also prefer the use of thermionic valve ( or " tube ") designs instead of transistors, especially in Single-ended triode output configurations for several claimed reasons:

Some ' hard ' eurosceptics such as UKIP prefer to call themselves euro-realists rather than ' sceptics ', and regard their position as pragmatic rather than " in principle ".

Some proponents of spelling reform view homophones as undesirable and would prefer that they were eliminated.

Some noted brass pedagogues prefer to instruct the use of the embouchure from a less analytical point of view.

Some authors prefer to write all expressions covariantly.

Some luthiers prefer this method of construction as they claim it allows better sustain of each note.

Some veterinarians prefer radioiodine treatment over surgery because it does not carry the risks associated with anesthesia.

Some users prefer " C " style presses over " O " presses, as there is more room to place bullets into cartridge mouths on " C " presses.

Some prefer monogamous relationships for sex, and others may prefer many different partners throughout their lives