Don Casey - Dragged Aboard Storm Tactics Handbook:
Modern Methods of Heaving-To for Survival in Extreme Conditions
by Lin Pardey and Larry Pardey


      

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Re: T & B Corrections


Subject: Re: T & B Corrections
From: nigel_gardner (Nigel_Gardner@XXX.XXX)
Date: Fri Nov 10 2000 - 07:03:54 EST


The International Standard Atmosphere is as your Aero friend says is 10 C
and 1013.2mb but the various table makers tended to use their own for
example:

Norie (the oldest tables still on the go, not having been out of print
since 1803) uses 10C and 1000mb
Burton 10.C and 1010mb
Inman 1015 and 50F (10C)
Hughes 1000mb and 50F

It does not really matter what base one uses provided you know which one
your set of tables uses.

What is quite another matter is the model used to generate the corrections,
and there are many different ones, many of the tables using a different
algorithm below and above about 10deg

NG





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