Griffo
Contributor
I would rather want to know what is the rationale of mandating keeping the compass on the left wrist. because if using it you need to concentrate on it quite a bit and normally bend your arm to be able to see it in correct angle. then your left hand is totally occupied and in an angle where it is difficult to hold a light in it. If you move the light to your right hand now all your arms are occupied and will screw up both buoyancy control and primary donating whenever you need to do that OR alternatively you just lose sense of the direction if using the left hand every now and then for the regular tasks. I would think the compass should be on the right wrist if the dive computer is also there and if using lights on left hand. but if NOT using a light then it would probably be easier to have the compass on the left because then the right hand is more task loaded.
I find the computer being much easier to read when on the right. That is probably mainly because I almost always have to use lights when diving here and using the light on the left.
I have no problem btw to control the wing inflator with either hand. I don't know if it's different in sidemount but at least normal wing inflators are pretty usable with both hands so I tend to use the hand which is less occupied at the moment
I've assumed Compass in left was for scootering. Like most things though, everything is a compromise, and while your computer needs to be instantly visible at all times during ascent / descent and the dive, the compass probably does not. Make a visual reference, swim to it, etc.