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Summary of the underwater skills and ISO references:

A 10m Diver

can comfortably do:

° Basic buoyancy control.

° Full emptying of the mask.

° The regulator recovery & emptying.

° Breathing on an alternate air source.

+ Has the required knowledge for diving at 10m.

& Has a minimum of 2 logged training dives in open water with an instructor.

A supervised diver.
(ISO 24801-1)

A 20m Diver

can comfortably do:

Like a 10m diver.

+ Perfect buoyancy control.

+ Remove the mask, swim, put it back & emptying.

+ Remove and put back the scuba tank & weight belt.

+ Has the required knowledge for diving at 20m.

& Has a minimum of 4 logged training dives in open water with an instructor.

Autonomous diver.
(ISO 24801-2)
(Max: 20m)

A 30m Diver

can comfortably do:

Like a 20m diver.

+ Can help another diver.

+ Has good skills in underwater orientation.

+ Has experience in various diving conditions.

+ Has the required knowledge for diving at 30m.

& Has a minimum of 10 logged training dives in open water with an instructor.

Autonomous diver.
(ISO 24801-2)
(Max: 30m)

A 40m Diver

can comfortably do:

Like a 30m diver.

+ Can rescue another diver.

+ Has a perfect mastering of the body & a calm breathing.

+ Is aware of the other divers & his/her own limit.

+ Has the required knowledge for diving at 40m.

& Has a minimum of 20 logged training dives in open water with an instructor.

Autonomous diver.
(ISO 24801-2)
(Max: 40m)

A Nitrox Diver is a 20m diver (or more) who has the required knowledge for diving with enriched air. (ISO 11107)

Important note: The above information summarize the essential requirements for the IFDI courses. For more details, you may also click on the following links: ISO 24801-1, ISO 24801-2, ISO 11107. As explained in the IFDI courses, there's a real difference between a dive at a depth of 20 meters or 40 meters. Therefore, IFDI considers safer to divide the ISO level (autonomous diver) into 3 categories: 20, 30 and 40 meters. The above mentioned depths are approximate values and should not be considered as strict values.

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