However, after driving through a tunnel, the bus becomes plastered with images of octopuses and everyone inside finds themselves wearing scuba diving outfits.

However, many cave divers penetrated caves prior to the advent of scuba with surface supplied reathing apparatus through the use of umbilical hoses and compressors.

However, the well known scuba cannot replace the helmet because a worker needs to have his feet planted on the sea bed to work.

However, for much of the 1950s and early 1960s, recreational scuba diving was a sport limited to those who were able to afford or make their own kit, and prepared to undergo intensive training to use it.

However the standard scuba backplate is ergonomically unsuited to this function.

However, once inside, Joni and Santiago always appear wearing their normal clothes while, if they entered from underwater, they should still be wearing their scuba gear.

However, man-made diving platforms are sometimes constructed in popular swimming destinations.

However, according to VH1's Behind the Music, Moon broke his tooth diving into the pool, which was empty of water at the time.

However, genetic analyses have demonstrated that these peculiarities are the product of strong natural selection instead: as opposed to, for example, plovers ( a much older charadriiform lineage ), auks radically changed from a wading shorebird to a diving seabird lifestyle.

However these devices hinder and prevent a snorkeler from free diving to any depth.

However, some advocate that this should include penetration diving ( as opposed to open-water diving ), whereas others contend that penetrating overhead environments should be regarded as a separate type of diving.

However, cave diving practice can differ markedly by locality.

However, some " technical diving " rebreathers are very burdened with safety devices such as inflatable flotation and open-circuit bailout.

However, psychology may explain the same experiences in terms of altered states of consciousness, which may come about accidentally through ( for example ) very high fever, infections such as meningitis, sleep deprivation, fasting, oxygen deprivation, nitrogen narcosis ( deep diving ), psychosis, temporal-lobe epilepsy, or a traumatic accident.

However, it is a popular diving and sport-fishing area.

However, when an artist is unconscious of the juxtaposition ( e. g., when a film maker means for a man in a gorilla suit with a diving helmet to be frightening ), the result is bathos.

However, in the same discussion, Straczynski also mentions that, " I didn't show a kiss because, in my experience, it's easier on all around if one steps into the shallow end of the pool first, and walks into the deep end rather than diving in and splashing everybody in the process.

However, the invention of the aqualung in 1943 by Jacques-Yves Cousteau and the wetsuit in 1952 by University of California, Berkeley physicist, Hugh Bradner and its development over subsequent years led to a revolution in recreational diving.

However, as recreational diving has a very low accident and death rate, it is a commonly claimed view that current training requirements are adequate.

However, in this case the onus is on the diving contractor to ensure acceptable safety during the diving operation.

However many professional courses would expect a participant to have progressed to that level in the recreational diving before becoming a professional.

However, Dr. Lambertsen and the OSS continued to work on closed-circuit oxygen diving and combat swimming.

However, since Ko Phi Phi Don is popular for diving and snorkeling, the locals have done away with dynamite fishing and other harmful activities that had probably threatened the reef even more than tourism.

However at the age of 17, he took a schoolmate's dare to swim to the bottom of a lagoon ( he grew up in a shellfish diving community ) and ruptured his eardrum.

However, equipment fails or gets damaged, and there was a regular if not continuous need for diving operations in and around oil fields.

However, it should be noted that because of risks associated with oxygen toxicity, divers tend not to utilize nitrox at greater depths where more pronounced narcosis symptoms are more likely to occur.

However, the system is designed, ingeniously and hopefully, so that no one man could initiate a thermonuclear war.

However, there is always the possibility that chance will make demands the dancers find impossible to execute.

However, it is important to trace the philosophy of the French Revolution to its sources to understand the common democratic origin of individualism and socialism and the influence of the latter on the former.

However, it was not of innocence in general that I was speaking, but of perhaps the frailest and surely the least important side of it which is innocence in romantic love.

However, neither of these two cities is on the desired July 1 to June 30 fiscal year.

However, there is a more profound consideration to this proposed merger than profit and loss.

However, if their United States income is not subject to the withholding of tax on wages, their returns are due June 15, 1962, if they use a calendar year, or the 15th day of the 6th month after the close of their fiscal year.

However, its modern one-story layout is designed to increase our production capacity, permit more efficient manufacturing, and substantially reduce current repair and maintenance costs.

However, because this vulnerability is mutual, it is to the advantage of neither side to destroy the opponent's cities, at least so long as the opponent has nuclear weapons with which to effect reprisal.

However, there is a minimum of legislative restriction on boating.

However, it is essential that the various mathematical symbols used in the equations be understood so that the mathematical processes can be done properly and in their correct order.

However, the use of tripods is not allowed.

However, there is also much to be gained by making use of the abilities of the local people who are available and interested in recreation.

However, that is not all he has to do.

However one looks at it, therefore, I'd say that your horoscope for this autumn is the reverse of rosy.

However, a major factor in binding dirt is the attraction between surfaces that goes under the name of Van der Waal's forces.

However, the conversion from mass to size is unreliable, since many photographic meteors give evidence of a fluffy, loosely bound meteorite structure with densities as low as Af.

However, as a field measurement, it is open to question.

However, this artery is known to be a nutrient vessel with a distribution primarily to the proximal airways and supportive tissues of the lung.

However, if there is no additional complex of singular lines, the order of the image regulus of a pencil is precisely Af.

However, the factor of physical isolation is not a static situation.

However, any such suggestion accounts for only some of the difficulties in hearing tone, or in developing a realistic attitude about tone, but not for the analytic difficulties that occur even when tone is meticulously recorded.

However, there always is some limit to the numbers who will spend the time and effort to acquire training.