SUUNTO D9 - Manual (Page 104)

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NOTE! Low temperature or an internal oxidation of the battery may cause the battery
warning even though the battery has enough capacity. In this case, the warning usual-
ly disappears when the Dive Mode is activated again.
10.2. SUUNTO REDUCED GRADIENT BUBBLE MODEL (RGBM)
The Suunto Reduced Gradient Bubble Model (RGBM) is a modern algorithm for pre-
dicting both dissolved and free gas in the tissues and blood of divers. It was deve-
loped in a co-operation between Suunto and Bruce R. Wienke BSc, MSc. PhD. It is
based on both laboratory experiments and diving data, including data from DAN.
It is a signifi cant advance on the classical Haldane models, which do not predict free
gas (microbubbles). The advantage of Suunto RGBM is additional safety through its
ability to adapt to a wide variety of situations. Suunto RGBM addresses a number of
diving circumstances outside the range of just dissolved gas models by:
- Monitoring continuous multiday diving
- Computing closely spaced repetitive diving
- Reacting to a dive deeper than the previous dive
- Adapting for rapid ascents which produce high micro-bubble (silent-bubble)
build-up
- Incorporating consistency with real physical laws for gas kinetics.
Suunto RGBM Adaptive decompression
The SUUNTO RGBM algorithm adapts its predictions of both the effects of micro-
bubble build-up and adverse dive profi les in the current dive series. It will also change