I contacted PADI about theirs a few years ago because I thought it was missing a very important part, one that is quite easy to forget. They responded by telling me that they agreed with me and were working to change it, but it would take a while to get that change into the literature. I think they must have decided against it.
I don't see my concern listed in any of the other lists as well.
I want to add in some way whatever instruments you are using to measure your dive.
Whether it is a watch, bottom timer, or computer, if it is worn on the wrist over a wet suit or dry suit, it is often the last thing to go on and a very easy step to forget.
Some computers must be switched on manually before you enter the water, and once you are in the water without turning them on, they will not function.
Next, if it is a computer and you are using nitrox, it is very easy to forget to switch it to the appropriate mix.
My thoughts were in fact spurred by a DAN story about a nitrox diver who made a last minute decision to change his tank to air, and he forgot to change his computer. He got bent because he was following the nitrox ndl levels instead of the air levels.
I don't see my concern listed in any of the other lists as well.
I want to add in some way whatever instruments you are using to measure your dive.
Whether it is a watch, bottom timer, or computer, if it is worn on the wrist over a wet suit or dry suit, it is often the last thing to go on and a very easy step to forget.
Some computers must be switched on manually before you enter the water, and once you are in the water without turning them on, they will not function.
Next, if it is a computer and you are using nitrox, it is very easy to forget to switch it to the appropriate mix.
My thoughts were in fact spurred by a DAN story about a nitrox diver who made a last minute decision to change his tank to air, and he forgot to change his computer. He got bent because he was following the nitrox ndl levels instead of the air levels.