Re: Need Beginner Equipment Help


-hh wrote:

It might have been something misinterpreted from a few weeks ago, when
John claimed something like experiencing a 35F bottom temperature,
which unfortunately violates the laws of buoyancy, since water is most
dense at 4C (39-40F)...and in short, is why ice floats, and lakes
freeze from the top down.

My memory's not always the best but I'm sure I remember getting
readings of low to mid-30's at Gilboa and at some little pond over in
Indiana. Gilboa was either in mid-November when we sunk the Christmas
tree or at the St.Paddy's Day dive in March (or perhaps both). Mike,
Luann and I went over to Indiana to try ice diving once and though we
found little ice cover the water was damned cold. Unfortunately I
haven't kept logs since shortly after I started diving so have no
records. I'm not even certain which computer(s) I would have been
using.

In any case my understanding is that although water is most dense at
about 4 degrees C. it can get colder (and less dense) and only goes
from a liquid state to a solid state at zero degrees C. Salt water
remains a liquid to a slightly lower temp. Maybe Star the scientist
type can sort us out on this one. I'll defer to her expertise.

JF

.

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