11-03-2014, 06:04 AM | #31 | |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
Quote:
http://en.wikipedia.org/wiki/Kayak_roll#History Last edited by vicky_molokh; 11-03-2014 at 06:08 AM. |
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11-03-2014, 06:28 AM | #32 | |
Untagged
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
Quote:
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check. |
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11-03-2014, 12:02 PM | #33 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
I was referring to Low-Tech, not kayaking, but what makes you think that rolling your kayak doesn't get you wet?
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11-03-2014, 12:06 PM | #34 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
It's not actually necessary to stay dry, as long as you don't have water continually moving in and out and you have sufficient insulation -- you just wind up with a layer of warm water next to the skin. Arctic waters require more padding than is generally practical with a wetsuit, but in the end what matters is rate of heat transfer, not being dry, so an impermeable layer of insulation can do the job.
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11-03-2014, 12:16 PM | #35 |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
The fact that getting more than a little wet and sailing on, without an opportunity to get to a shelter and change clothes, will tend to get you dead, not just wet. So those rollers had to have a way to safely continue paddling after the roll. (Wiki also claims that the anorak is waterproof, while the fishtail parka isn't. So that seems to support Low-Tech's claim of waterproofness. Though depth of waterproofing might as well be less than 1 yard deep, sure. And I do realise WP isn't 100% reliable, to say the least; still, the two sources seem to agree.)
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11-03-2014, 02:09 PM | #36 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
Water resistant clothing will handle a brief immersion, by virtue of having multiple layers that will soak up the moisture; handling sustained immersion requires sealed joins that are beyond the capabilities of low tech levels. In any case, the tech described in Low-Tech is quite clearly oil, grease, and wax.
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11-03-2014, 08:52 PM | #37 |
Join Date: Oct 2012
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
And I've got a character who was once dumped into Lake Superior in February in his underwear. High levels of escape got problem one out of the way. Very Fit and HT 14 with 18 FP came in handy next. I found a document online listing survival times in water at various temperatures, and determined at that temp you would need to make RAW "freezing water" rules every 4 minutes. So an hour of swimming to shore, then a 4 hour or so hike to the nearest town. He wound up at 6 FP left (12 "virtual FP") when he reached town, all due to cold at that point. Using the stock rules, I determined the temp as +15 F and the windspeed as 40 MPH, for a windchill of -8 F.
One thing I never did figure out is how long it would take for him to fully warm up, now that he's got warm clothes and a warm building. Assuming breath Control and Very Fit didn't apply, it would take 15 minutes per full FP?, for 3 hours? That sound about right? Anyway, he had some rather "unfinished business" back in Duluth, as you can rather imagine, and had to catch the next train back there. (It was the 1940's. That was how you did it back then. Also: Asking for money for a ticket in coach on the morning local.) On the plus side, apparently the parish church there (Catholic, since that was his friend's religion, more or less, and they had never talked about religion anyway, so it seemed right) has some rather wide rafters, enough to hide a skinny person there to watch his own funeral. Oh well, if he ever needs to become legally dead, the priest and the tombstone there should come in handy. |
11-03-2014, 11:48 PM | #38 | |
Untagged
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
Quote:
If the water can get to your skin, then obviously insulation doesn't exist.
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check. |
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11-04-2014, 12:12 AM | #39 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
The rate at which heat can escape from a wetsuit is determined by heat transfer through the suit (i.e. insulation) plus the rate at which the water under the suit is replaced, plus any heat flow through gaps. Insulation most certainly does exist -- though a drysuit provides more insulation at a given thickness and doesn't have any losses to fluid flow at all, and thus handles freezing water better.
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11-04-2014, 12:40 AM | #40 | |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: Hazards: Cold. Of wind double-dipping, clothes into water single-dipping et al.
Quote:
It's more complicated with Breath Control, which isn't as explicit. |
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Tags |
clothes, clothing, cold, frostbite, hazard, wind |
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