Originally Posted by BogMonster
No I daresay it isn't, but in a way that is the point! Admiralty charts are probably considered by many to be the bible, whereas the folks who surveyed that probably thought "bugger that - looks like too much kelp in there" and moved on. The question really is where is the line drawn between "well there isn't much traffic around here so we'll skip that bit" and doing it properly.
Good point! There should be a caveat, other than the one mentioned before about the date of survey, there should be a "degree of confidence" - I know some of the pacific islands are not even in the right place (up to 2 miles out) on some charts. Admittedly I think most of the errors are French Polynesia!!