Shearwater Petrel EXT, Руководство по эксплуатации, Страница: 29 / 65

Shearwater Petrel
Revision 1.1.0 29 Shearwater Research Inc.
Decompression and Gradient Factors
The basic decompression algorithm used for the computer is Bühlmann ZHL-16C� It has
been modified by the use of Gradient Factors that were developed by Erik Baker. We
have used his ideas to create our own code to implement it� We would like to give credit
to Erik for his work in education about decompression algorithms, but he is in no way
responsible for the code we have written�
The computer implements Gradient Factors by using levels of conservatism� The levels
of conservatism are pairs of number like 30/70� For a more detailed explanation of their
meaning, please refer to Erik Baker’s excellent articles: Clearing Up The Confusion
About “Deep Stops” and Understanding M-values. The articles are readily available on
the web� You might also want to search for “Gradient Factors” on the web�
The default of the system is 30/70� The system provides several settings that are more
aggressive than the default�
Don’t use the system until you understand how it works�
Graph from Erik Baker’s “Clearing Up The Confusion About Deep Stops”