| This drill is the easiest of the lot, it is called a "Modified Valve Drill" because it is a shortened version of the full "Valve Drill". It is meant to be done shortly before you get in the water simply to check that all the pillar valves and isolation manifold are open (or closed but pressurised for decompression cylinders). You should already have checked that all second stages are working. |
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It should also be performed from time to time during a dive to check nothing has been "rolled off" eg on a shot line whilst descending, or whenever there might be an accidental impact with wreckage etc.
Whilst on land it is easier if you rest your tanks on a hard surface to push the tanks up. Few people can fight the force of gravity to reach their valves out of the water
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1.
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Reach up behind you with your right hand and check that the right hand pillar valve is fully open (anti-clockwise) and can still be turned off IF you really had to. This is to check that it hasn't been "jammed" open |
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2.
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Reach up behind you with your right or left hand and check that the isolation valve is similarly fully open and can still be turned off |
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3.
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Reach up behind you with your left hand and check that the left pillar valve is similarly fully open and can still be turned off |
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4.
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Check that all decompression bottles will turn on but are turned OFF to prevent them being accidentally breathed at depth. They should however be kept pressurised to prevent water ingress into the internals and as a check against regulator failure. |
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5.
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Check that any argon or inflation system is fully open and can still be turned off |
Easy huh?
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Hit
Counter Complements of http://www.digits.com.
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Diving can be
a hazardous sport and the information contained within this site is
not intended to replace formal training. |
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© Copyright H Beasley 13 March 2003
