Page 14
Doc. 13301-Tec-RevB (2022-05-25)
Technical Modes
Operating Instructions
Current Circuit Mode
The active breathing mode configuration is displayed
on the far left of the bottom row� The options are:
The Bottom Row
The bottom row of technical dive modes displays the
current circuit mode, active gas, No Decompression
Limit (NDL), and Time To Surface(TTS)�
No Decompression Limit (NDL)
The time remaining, in minutes, at the
current depth until decompression
stops will be necessary� Displays in
Yellow
when the NDL is less than the
low NDL limit (Default 5 minutes)�
NDL Replacement Options
Once NDL reaches 0 (i�e� deco stops needed), the
NDL display can be replaced by a small selection of
custom options to best utilize this space� See details
on page 69� The Mini option is described in more
detail on page 15�
The NDL replacement options are:
• Ceiling
• @+5
• Delta+5
• GF99
• SurGF
• Mini
Time To Surface (TTS)
The time-to-surface in minutes� This is
the current time to ascend to the surface
including the ascent plus all required
deco stops�
TTS
OC 15/40 0 56
O2/HE
NDL
CC
OC
BO
OC = Open circuit
CC = Closed circuit
BO = Bailout
(displays in
Yellow
to indicate bailout condition)
Active Gas
The current active gas shown as a percentage of
Oxygen and Helium� The remainder is assumed to be
Nitrogen�
20
NDL
5
NDL
Important!
All decompression information including
Deco Stops, NDL, and Time to surface are
predictions that assume:
• Ascent rate of 10mpm / 33fpm
• Decompression stops will be followed
• All programmed gases will be used as
appropriate
See the Decompression Information
Accuracy section on page 29 for more
information�
35
TTS
In open circuit mode, this is the breathing gas fraction�
In closed circuit mode, this is the active diluent gas�
The active gas displays in yellow when there is a
better gas available� Only turn on gases you plan to
use on your dive�
21/00
O2/HE
10/50
O2/HE
21/00
O2/HE
Air:
21% O2
79% N2
Trimix:
10% O2
50% He
79% N2
A better
deco gas is
available