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1. INTRODUCTION
Congratulations on your purchase of the SUUNT O GEKKO dive computer.
The GEKKO builds on the Suunto tradition of deli vering feature-rich easy-use
dive computers. Push button controls access a wide selection of choices and the
display is optimized for the dive mode chosen. This dive computer is a compact
and sophisticated multipurpose di ve instrument, designed to gi ve you years of
trouble-free service.
Choice of Operating Modes and Set-up Options
User options for the GEKKO are selected using the push buttons.
Pre Dive confi guration and setup options include:
• Choice of operating mode - Air / Nitrox
• Choice of unit - Metric / Imperial
• Maximum depth alarm
• Dive time alarm
• Clock, calendar
• Mix Oxygen fraction % (Nitrox mode only)
• Maximum PO
2
(Nitrox mode only)
• Altitude adjustment
• Personal adjustment
Continuous Decompression with Suunto RGBM
The Suunto Reduced Gradient Bubble Model (RGBM) utilized in the GEKK O
predicts both dissolved and free gas in blood and tissues of divers. It is a signifi -
cant 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 profi les.
In order to optimize how to respond to different added risk situations an additional
category of stop, referred to as a Mandatory Safety Stop, has been introduced. Also
a countdown for the Recommended Safety Stop is included. The combination of
stop types will depend on the specifi c dive situation.
To get the most from the safety benefi ts be sure to read the summary of the Re-
duced Gradient Bubble Model in chapter 6.2.
1.1. SAFETY PRECAUTIONS
Do not attempt to use the dive computer without reading this instruction manual
in its entirety, including all the warnings. Make sure that you fully understand the
