The Suunto Rgbm/Deep Stop Algorithm; Emergency Ascents - Suunto D9 User Manual

5.1. The Suunto RGBM/Deep Stop Algorithm

Suunto's Reduced Gradient Bubble Model (RGBM), utilized in the Suunto D9 , predicts
both dissolved and free gas in the blood and tissues of divers. It is a significant advance
on the classic Haldane models, which do not predict free gas. The advantage of Suunto
RGBM is additional safety through its ability to adapt to a variety of situations and dive
profiles.
The Suunto D9 allows you to choose between a traditional Recommended Safety
Stop and Deep Stops. Deep Stops are safety stops that occur deeper than traditional
stops, with the purpose of minimizing microbubble formation.
In order to optimize the response to different increased risk situations, an additional
category of stop, referred to as a Mandatory Safety Stop, has been introduced. The
combination of stop types depends on the user settings and the specific dive situation.
To get the most from the RGBM safety benefits, refer to Section 9.2. RGBM.

5.2. Emergency ascents

In the unlikely event that the dive computer malfunctions during a dive, follow the
emergency procedures provided by your certified dive training agency or, alternatively,
follow these steps:
Assess the situation calmly and then move promptly to less than 18 m/60 ft.
1.
At 18 m/60 ft, slow down your ascent rate to 10 m/33 ft per minute and move to
2.
a depth between 3 and 6 m/10 and 20 ft.
Stay there for as long as your air supply will safely allow. After reaching the
3.
surface, do not dive for at least 24 hours.
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