Once a submarine sinks beyond 180 msw the only option normally available to the crew is to await submarine rescue.
There are two methods of escaping from a disabled submarine. One is where the survivors escape submarine and make an ascent to the surface. This ascent may be done through the escape tower (SET), where the submariner spends the least time exposed to ambient environmental pressure.
There is no need for the average amateur diver to do contaminated water diving, but circumstances occur where a professional diver must do so.
Non-divers and many recreational divers consider that the life and work of the professional diver is one of glamour and excitement. This is not accurate – diving job is often a tedious with occasional catastrophic hazards. Usually it is cold, wet and boring, but reasonably well paid.
Scuba diving represents different types of diving profession, such as: scientific divers, dive instrucors, fish farm diving. Get to know the medical aspects of this kind of work.
Breath-hold diving is readily available to all, without relying on complex equipment or facilities. It is employed by primitive peoples and in remote areas, frequently permitting diving to depths of 20 meters or so.
Surface supply diving equipment, using compressors or large storage cylinders, allows for prolonged durations at all depths.
Worldwide there are two different approaches to diving for disabled. The first approach is to offer no special training for the disabled and require them to undertake the standard open-water course like everyone else. Most of the entry-level courses do not teach buddy rescue skills, a problem for many disabled divers, and many handicapped individuals will be able to successfully complete the course.
The era of scuba diving being considered a male dominated macho sport is long past. Female divers account for some 35 per cent of all recreational diving certifications issued, and are employed worldwide in recreational, commercial and in certain specific military diving operations. Whilst anti-discrimination laws and equal opportunity legislation has paved the way, there are important physiological differences between the sexes, and these should be considered when assessing fitness to dive.