Rule Question - Temperature and fatigue points
 

It's freezing here in Oslo so I wondered if there is any spesific rules in regards to temperature and fatigue points.

There are, in Merc2000 and in one of the source books - Bear's Den I think.

COLD WEATHER
Cold-weather conditions are encountered when the perceived
temperature (after adjustments for wind chill and other factors)
drops to around 0 degrees C (32 degrees F) or below. Coldweather
conditions can also be accompanied by rain, sleet, or
snow, depending on the air temperature. Characters in cold
weather without adequate protective clothing accumulate twice
the levels of fatigue as under normal conditions.
Any character falling asleep in an unprotected condition continues
to accumulate fatigue until all attributes affected by
fatigue (STR, AGL, CON, and INT) are reduced to zero. At this
point the character is considered frozen to death if the
temperature is below freezing (otherwise the character remains
unconscious). Cold-weather clothing protects a person from
these effects. Characters recover fatigue only inside a heated,
protected enclosure (such as a cabin, shed, or tent), or when
the temperature rises 10 degrees above freezing.

EXTREME COLD WEATHER
Extreme cold-weather conditions are encountered when the
perceived temperature drops to around - 20 degrees C (about
0 degrees F) or below. The main benefit of extreme cold weather
is that it seldom snows (although the wind often kicks up loose
snow from the ground). The effects of extreme cold weather
on an unprotected individual are the same as listed above, except
that fatigue levels accumulate at three times normal for
unprotected characters, and twice normal for characters wearing
only cold-weather gear. Extreme cold-weather gear provides
protection from the increased fatigue. Characters recover fatigue
only inside a heated, protected enclosure (such as a cabin, shed,
or tent), or when the temperature rises 10 degrees above
freezing.

There are also rules for hot weather and very hot weather - mostly the same implementation.

Thanx...exactly what I was looking for.

These rules also appear at the end of Boomer, the third part of the Last Submarint trilogy which takes place largely in Norway. Just finished rereading that over the weekend.