If you don't recognise markings on a diving cylinder don't consider them to unimportant. Markings can vary from region to region and should always be taken into account before using the cylinder.

The above markings in order from left to right would be the month the cylinder was tested - July, the tester's mark - here represented by the @ symbol but it will vary from tester to tester, and finally the year the cylinder was last tested - 2017.

Testing regulations will also vary from region to region so if in doubt about the validity of the cu#ylinde you're asked to use refuse it and ask for a new cylinder.

Learn more about dive equipment on the PADI Divemaster course. Book Now and Ignite Your Life today!

Check the reverse of the PADI RDP or the inside lid of the PADI eRDPml for the special procedures to follow if you have accidentally exceeded the No Decompression LImits for your dive.

This is why emergency breathing equipment kept at a depth of approximately 5 metres is required to for deep training and why you should have a redundant air source for divers to use on non-training programs.

Learn more about the set up of redundant emergency breathing equipment on your PADI Deep Diver Specialty Cours and the PADI Divemaster program. 

Remember that the constants for the PADI Dive Theory Exams are always found at the top of every exam sheet so don't be overly concerned about having to recall them.

Every metre is salt water exerts 0.1 AYM of pressure. Multiply that by 35 and you'll get 3.5, add the additional atmpos[here of pressure from the surface and you'll get 4.5 ATM

Need help with physics in diving? Message me and I'll see what I can do.

Time to break out your ancient Greek again for a physiology question. Hypo means less than and Capnia is a derivative of the word for smoke, hence carbon.

This can be the result of hyperventilation which is why divers are taught to breathe in a relaxed manner whilst on SCUBA.

Carbon Dioxide is the primary trigger in the breathing reflex so its imperative we maintain normal amounts in our system to remain safe during diving activities.

The PADI Advanced Open Water program offers two certifications which are made up from the building blocks of Adventure Dives.

Students can effectively build their own bespoke continuing education experience giving the program a huge amount of flexibility.

Some Adventure Dives require the Instructor to be a PADI Specialty Instructor in that area such as Enriched Air Diver, Sidemount Dive and Self-Reliant to mention a few. Check your PADI Instructor Manual-Advanced Open Water Course-Section 3 for more details. 

Expand your horizons and become a PADI Specialty Instructor today!