Any time a cylinder is damaged or exposed to high temperatures it should be hydrostatically tested. This is to ensure that it is still structurally sound before being filled again as a damaged or weakened tank has the risk of rupturing. 

Want to join one of my upcoming PADI Divemaster programs? It includes a free introduction to equipment with one of our equipment technicians. Book Now and Ignite Your Life today!

The U.S Navy table is based on a different decompression model than the PADI RDP, therefore, you cannot transfer pressure groups between the two models.

The ambient pressure at altitude and if we assume that the percentage of oxygen in air is 21% that gives us a partial pressure at 1 ATM of 0.21.

If we multiply that by the ambient pressure at the altitude we will be diving (0.21 x 0.8) we will get the PPO2 at that altitude. 

making sure equipment fits is more than just making sure it's comfortable. We should consider some safety factors too.

The BCD must supply sufficient lift and neck seals should be effective restricting water but not blood flow. 

Learn more about physiology in diving on one of my upcoming PADI Divemaster or PADI Instructor Development Course programs. Book Now and Ignite Your Life today!

There are two Solstices; Summer and Winter, and two Equinoxes; Autumnal and Vernal, the latter signalling the start of Spring in the northern hemisphere. 

Message m if you like to join one of my upcoming PADI professional development programs at This email address is being protected from spambots. You need JavaScript enabled to view it.