The Con Ed Admin Doc, for short, covers the students for all recreational education after the completion of their entry-level scuba program for 12 months, either with the same instructor or same dive centre.
This means a student completing the PADI Advanced Open Water Diver course may enter the PADI Rescue Diver course with a different PADI Instructor at the same PADI dive centre, or change location and take the course with the same instructor.
It is now required for the PADI Advanced Open Water Diver course and the smart money would be to use it for every recreational continuing education program because of its flexibility.
Its date depends on which side of the Equator you are on the Autumnal Equinox and its opposite, The Vernal or Spring Equinox signal the change in season just as the Summer and Winter Solstices do.
Is this the start or end of your diving season?
The U.S Navy tables were initially designed for single depth, non-repetitive dives. This meant that they very conservative and didn't really fulfill the needs of recreational divers. That's when Dr. Raymond Rogers and his team developed the PADI RDP.
Because the two table are derived from different models using compartment and wash out information, pressure group designations are not interchangeable.
There is a myriad of weighing systems now employed in the diving community. Their commonality is that should all the ability to be quickly released in case of an emergency.
To counter instances of diving accidents and incidents of divers surfacing and struggling to establish positive buoyancy the emergency weight drop is taught to all PADI Open Water Divers and ReActivate participants.
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The Carotid-Sinus is located at the origin of the Carotid Artery and consists of nerve involved in baroregulation, pressure regulation in sync with the body's external environment.
Physical triggering of the reflex can result in a loss of consciousness in a diver which could be potentially lethal while at depth. Alway fit exposure protection correctly.