[bonzini]

Absolutely, I am a somewhat experienced diver looking at certifications, but it's all too easy to forget things even if you have more than a vague recollection. Whenever I haven't dived for a couple years, I always ask an instructor to check on me while I prepare for the first dive, because I just don't trust myself.

A dive or two later I am okay with helping newly certified divers both on shore and on the boat, but on the first dive after some time you should never overestimate your memory.

Diving is safe if you know how to keep it safe.

[thaumasiotes]

> it's all too easy to forget things even if you have more than a vague recollection. Whenever I haven't dived for a couple years, I always ask an instructor to check on me while I prepare for the first dive, because I just don't trust myself.

Do you have a checklist?

[bonzini]

If you mean something to go through physically (e.g. on paper) no, at least not for non-technical dives. There is a standard list of things to do, which I agree with the parent comment you should remember more than vaguely before diving.

[nradov]

Here is the recommended pre-dive checklist.

https://gue.com/blog/the-gue-pre-dive-sequence/