Pitlamp
Well-known member
To answer you definitively I'd have to do quite a lot of work rationalising a huge amount of survey material and I have more urgent plates spinning right now. Even with the most precise distances (and much of it was actually measured underwater with a non stretch Fibron tape) it's still not a definitive answer. The trouble is it depends on whether you quote the absolute shortest route or whether you quote the distance of the actual route taken through the underwater complex (bearing in mind very heavily kitted divers will swim through the largest passages from choice - and the largest passages are, in many cases, longer). This is why attempting to come up with such statistical lists which others may then quote as gospel is not always the best of ideas.