Before we let new students in open water we run through their weighting. The topic is covered in the BSAC Ocean Diver course; and the drysuit course for those trained in a wetsuit. BSAC go through it all again in the Buoyancy & Trim Workshop, we even provide a weighting record sheet for those new to drysuits to use.No, I wasn't. Please enlighten me.
Because AFAIK it's all about the undergarments and has nothing to do with the suit itself. At least with a membrane suit. I've used wildly different amounts of weight wearing the same suit. The difference was the undergarments, from a thin layer of underwear in the pool to a thick, heavy undersuit backed by some quality wool underwear during a cold winter dive.
Yes undergarments make a difference, but that’s part of the conversation to get divers to work out their weighting.