The answer for this can be found in the PADI Instructor Manual - Divemaster Course - Section 4 and in the student materials for the PADI Divemaster program.

The three knots give a basic introduction to line use on water vessels and underwater and also give them an insight into the PADI Search and Recovery Specialty Diver course.

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If a cylinder is filled to a greater pressure then the test specifications and non-reclosing rupture disk located in the valve assembly. 

This allows excess pressure to vent from the cylinder valve and thus avoids the rupture of the cylinder body itself. 

We offer a free equipment day with our in-house technicians with every PADI Divemaster program with Master Divers on beautiful Koh Tao, Thailand. 

The Vestibular System provides us with our sense of balance and spatial awareness and is located in the inner ear.

Want to learn more about physiology? Join one of my upcoming PADI Divemaster or PADI Instructor Development Course programs. Book Now and Ignite Your Life today. 

The eRDPml has three processes - Dive Planning, (minimum) Surface Interval and Maximum Depth and you'll have to go in and out of Dive Planning and Surface Interval and record all the bottom times, minimum surface intervals and required safety stops to get the answer as it's not looking for the dive time but the time it takes to complete all aspects of these profiles. 

Start with Dive Planning and enter the relevant information for Dive 1. After this, it will you a pressure group designation and whether a safety stop is required. Remember this, you'll need it in a moment.

Now exit and go to Surface Interval. Enter the pressure group designation from the previous dive and the details of Dive 2. This will give you a minimum time which you should also record to get the answer. It may give you a required safety stop alert. This can be disregarded at this stage as you're about to step back in Dive Planning to input the relevant information.

Now you're back to Dive Planning and the eRDPml will ask you if it's the first dive and the answer is; no'. I will then ask you if you have the pressure group designation after the last dives surface interval; this throws a lot of people, answer 'no' to this question too. 

You'll then be able to input the pressure group designation for the previous dive, the minimum surface interval you discovered from the Surface Interval process and the details of Dive 2.

Repeat the steps listed above for Dive 3 and then take all the bottom times, surface intervals and required safety stops, add them together and you'll have your answer.

Be aware of the W, X, Y and Z rule with these kinds of questions too.

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The three types of heat transmission listed in PADI materials and how much they affect a diver are easy to remember if you think of them in alphabetical order.

From greatest to least - Conduction, Convection and Radiation.