Search results
Results from the WOW.Com Content Network
For safety and efficiency, divers may need to communicate with others diving with them, or with their surface support team. The interface between air and water is an effective barrier to direct sound transmission, [9] and the natural water surface is also a barrier to visual communication across the interface due to internal reflection, particularly when not perfectly smooth.
Dive signal for out-of-air emergency. In emergencies when a diver runs out of air in the cylinder in current use, and when there is no buddy around to donate air, the use of a redundant air supply (such as independent twins or a pony bottle), allows a diver to perform an ascent in a controlled manner, breathing as normal. [8]
Technical diver during a decompression stop. There is some professional disagreement as to what exactly technical diving encompasses. [10] [11] [12] It is an arbitrary distinction, and the line has been drawn in different places by different organisations, and has shifted on a few occasions.
Communication is central to buddy and team diving. DIR divers must be competent at underwater communication by hand signals and light signals, and to use them to ensure that they are always aware of the status of the rest of the team. DIR divers have an extended range of hand signals, some particularly relevant to overhead and decompression diving.
A Navy buddy diver team checking their gauges together. Buddy diving is the use of the buddy system by scuba divers and freedivers.It is a set of safety procedures intended to improve the chances of avoiding or surviving accidents in or under water by having divers dive in a group of two or sometimes three.
Divers, including professionals, generally use hand signals when visibility allows. Recreational divers must be familiar with the hand signals their certification agency uses. These have to a large extent been standardized internationally and are taught in entry-level diving courses. [35] Technical divers commonly add a few more.
A diver training standard is a document issued by a certification, registration, regulation or quality assurance agency, that describes the prerequisites for participation, the aim of the training programme, the specific competences that a candidate must demonstrate to be assessed as competent, and the minimum required experience that must be recorded before the candidate can be registered or ...
The PADI Nitrox tables are laid out in what has become a common format for no-stop recreational tables Video: Setting the bezel of a diving watch to the start time (minute hand) of a dive at the beginning. Divers used this in conjunction with a depth gauge and a decompression table to calculate the remaining safe dive time (or required stops ...