Hello everyone,
I am getting certified in 3 weeks and I KNOW they are going to over weight me.
They shouldn't and chances are they wont
I understand you have to "experiment" and see how much weight you need as you become more experienced but I am looking for a guide line.
No such thing as a guideline. Different tanks, different suits, different body fat %, different size person, different salinity of water. Forget the guidelines, they're worthless.
The only way to do it is a proper weight check which is done as the very first thing on the first dive. Then there's no guesswork needed at all.
Get in, fully empty the BC, get someone to hand you weights whilst breathing out fully until you reach a point where you can JUST sink. Then add the weight of air in your tank (2kg or so) and you're done.
Most people i see diving massively overweighted used one of these so called guidelines and couldnt be bothered with a check.
Any decent instructor should have you doing a weight check as the very first thing.
Incidentally, did you not do weighting in the pool with full kit? I dont let anyone leave the pool until they're properly weighted with their proper open water gear (ok its fresh water but simply adding 2kg to go into salt works then).