Suunto D9 manual Rgbm

NOTE

9.2. RGBM

Low temperature or an internal oxidation of the battery may activate the battery warning even though the battery has enough capacity. In this case, the warning usually disappears when the DIVE mode is activated again.

The Suunto Reduced Gradient Bubble Model (RGBM) is a modern algorithm for predicting both dissolved and free gas in the tissues and blood of divers. It was developed in 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 significant 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 dissolved-gas-only models by:

•Monitoring continuous multiday diving

•Computing closely spaced repetitive diving

•Reacting to a dive deeper than the previous dive

•Adapting to rapid ascents which produce high microbubble (silent-bubble) build- up

•Incorporating consistency with real physical laws for gas kinetics

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