SUUNTO D9tx - Manual (Page 121)

10.2.1. Suunto Technical RGBM decompression model
Suunto's decompression model development originates from the 1980s when Suunto
implemented Bühlmann's model based on M-values in Suunto SME. Since then re-
search and development has been ongoing with the help of external and internal ex-
perts. In the late 1990s Suunto implemented Dr. Bruce Wienke's RGBM bubble model
to work with the M model. The first commercial products with the feature were Vyper
and Stinger. With these products the improvement of diver safety was significant.
Now Suunto has taken another leap in decompression modeling by introducing Suunto
Technical RGBM decompression model with He tissues.
Suunto Technical RGBM model is a modified version of the M-value model. Calculation
of the M-value model can be found in common dive literature. Modifications have been
made to have the model follow RGBM theory as closely as possible. The modifications
have been conducted with the help of Dr. Bruce Wienke. Functionality of Suunto
Technical RGBM has been validated and verified to the depth of 120 m/393 ft with
hundreds of test dives both in the field and in laboratory. The algorithm should not be
used in deeper depths than the verified depth.
Suunto technical algorithm models the human body by using nine tissue groups. In
theory the model is accurate if there are more tissue groups, but using more than nine
tissue groups has no practical significance.
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