Suunto Nautic S User Guide

Example - Multigas mode

The following example shows a decompression dive to 40 m in Multigas mode and with the following gases: NX28 (main gas), NX99 decompression gas.

1. Pre dive screen – showing the active gas (NX28), set ppO2 and MOD.

   

2. NDL alarm at 5 min.

   

3. NDL reaches 0 and decompression is needed. The gauge changes to orange indicating Deco time. The NDL area shows the TTS value including deco stops and safety stop. The ceiling value is displayed in the switch window.

   

4. The ceiling value is 9 m so you can ascend to this depth within the ascent speed limits. Once arriving close to the ceiling depth and entering the decompression window area, two arrows appear next to the depth number and a timer appears in the Deco field indicating a deco stop of 1 min. Once the countdown is 0, the TTS value is displayed again and the ceiling value has changed 3 m shallower, to 6 m.

   

5. Gas change at 6 m. The decompression time is always calculated with the assumption that you use all the gases found in the Gas list. Once ascending to 6 m, a gas change to NX99 will be suggested. Once switch is made, the information of the current gas appears. If you decide to dismiss the gas change, the decompression information will not be accurate.

   

6. Arriving at the last stop. Once the decompression time is cleared, the deco badge disappears and the stop turns into a safety stop. In this example, the safety stop is set to Adjusted, so the countdown starts at 1'30 due to longer time at 6 m.

   

7. If you ascend above the decompression or safety stop window, an arrow and a warning will be triggered and prompt you to descend back to the window.

   

8. Once all stops are done, the Stop done info will appear in the switch window and it is then safe to ascend to surface.