Thanks for the help. I really do need to figure this out. I'm helping a friend prepare for a singlehanded circumnavigation of the Americas. Last trip (in the Pacific) he was miserably cold, days on end, as he sailed toward Alaska -- he thought he'd packed plenty of insulation, but apparently did not (and he came from the South Pacific which made everything seem colder than it was, by contrast).
He wants to methodically select and carry sufficient clothing and sleeping bags, yet, like all of us, his space is limited (a sailboat isn't so big once you provision it for several months of sailing). I've been telling him that understanding CLO is the way to do this (semi-)scientifically, or at least, methodically. Yet every time I try to explain CLO to him, I get tripped up by things such as a down jacket being either .5 or maybe it's 3.5, who knows, no explanation for the difference.
For a user of the system, Iclo is kinda academic, and only useful to compute CLO, which is what you want and need to make estimates.
I have Richard's posts to thank for what little I understand of CLO, (thanks Richard). What I need is a "CLO for Dummies," I guess.
So -- no resolution on the tables at Wiki and Toolbox, vs the numbers we see here at BPL? Choices:
- Discard all the numbers in the tables, they're wrong. Hunt through all the BPL posts and use those.
- There's a misunderstanding or conflation of what the numbers in the columns are; eg, Iclo vs CLO vs whatever
- The numbers in the tables are close to correct, on average; the numbers we get from manufacturers are vastly inflated;
- The numbers in the tables are close to correct, on average; there are a few errors for heavier clothing;