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6.2. REDUCED GRADIENT BUBBLE MODEL,
SUUNTO RGBM
The Reduced Gradient Bubble Model (RGBM) is a modern algorithm for tracking
both dissolved and free gas in the tissues of divers performing a wide variety of
maneuvers. Unlike the classical Haldane models, the RGBM can address a number
of circumstances outside the range of just dissolved gas models by:
• monitoring continuous multiday diving
• tracking closely spaced repetitive diving
• accounting for diving deeper than previous dive
• regulating rapid ascents with high degrees of Doppler bubble formation
• incorporating consistency with real physical laws for gas kinetics
• taking a modern approach to a diffi cult problem.
The SUUNTO RGBM algorithm is developed in co-operation with SUUNTO
and Bruce R. Wienke. It is based both on laboratory experiments and diving data
(for example DAN’s dive data).
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