In response to the need of a dive planner that met the needs of recreational divers Dr Raymond Rogers and his team tested and developed the PADI Recreational Dive Planner using a modal that consisted of more tissue compartments than the military-style tables, it was designed to replace.

This lead to longer No Deco Limits, shorter surface intervals and longer adjusted NDL's.

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Having properly fitted exposure protection that is correctly suited to the environment is imperative.

Make sure you are discussing these factors with your customers and students when they diving in new locations, taking continuing education or trying new equipment.

Remember, you are a 4E's Counsellor. 

Learn more about this on my next PADI Instructor Development Course and check out the Thinking Like An Instructor section to look at how judgement and standards integrate for a better diving experience.

The standards for each individual PADI Specialty Diver program are contained within the Specialty Dive Instructor Materials. 

A look into the PADI Wreck Diver Specialty materials and you'll see an interesting application for the Open Water Dives if the student has completed the Night Adventure Dive or has similar or greater experience/certification.

I think it's a great way of having the students have a variety of experiences if diving the same wreck for all of the PADI Wreck Diver Specialty course dives.

The calculation for this is very straight forward. 

Firstly, we need to find the pressure exerted at the depth of water they plan to dive at - the constant for freshwater is 0.097ATM/m.

This makes the first part of our equation 25x0.097=2.425 ATM - Now we add the pressure exerted by the ambient air pressure at sea level 2.425+1=3.425.

Lastly, we multiply the total pressure by the SAC rate the diver has at the surface - 12x3.425=41.1 l/min

Although the independent studt#y for the PADI Emergency First Response recreational programs is options#al I highly recommend its use.

Allowing the students to take on new information prior to the classroom setting will allow them to move at their own pace, means that they show up to the classroom with relevant questions and allows for additional physical practice time in the classroom as no lecture-style presentation needs to be conducted.