Oceanic ATOM 2.0 - Manual (Page 2)

FREE Dive Operating Mode:
Although breathing apparatus is not utilized for FREE Dive activities, nitrogen tissue loading remains a factor. Nitrogen
loading is calculated based upon a fixed FO2 of AIR. Since a user has the option of alternating between NORM
(SCUBA) and FREE Dive activities within a 24 hour period, nitrogen calculations and the displayed value of No Deco
Dive Time Remaining (NDC Time) are carried over from one operating mode to the other, which permits the user to
maintain awareness of nitrogen absorption and offgasing status.
The mathematical model currently used in the ATOM 2.0 is based on no decompression/decompres-
sion multilevel repetitive dive schedules. This algorithm does not take into account the physiological
changes associated with the high pressures that competitive type Free diving can expose a diver to.
Manual page 148, Fig. 135 - FREE DIVE MAIN display:
No Deco Dive Time (NDC) is added to the Main Display which appears as shown here.
It also appears on Manual Fig. 138 - 142 and the FREE Dive Main on the back of the Review Card.
If for any reason, the ATOM 2.0 shuts Off then turns On again during any Dive, the
message ERR (Error) will be displayed with the Up Arrow and current Depth.
Upon surfacing and any time thereafter when Dive Computer Mode is accessed from
Watch Mode, only the message ERR will be displayed. All other DC Modes/screens
will be inaccessible. If this occurs, the ATOM 2.0 must be returned to the factory for
evaluation/service prior to any further use for diving activities.
Fig. 135
added
WARNINGS:
 Ensure that you know which Operating Mode is selected (NORM, GAUG, or FREE) prior to
commencing any dive.
 Conducting Free dives within a 24 hour period after conducting SCUBA dives, combined with
the effects of multiple rapid Free Dive ascents, increases your risk of decompression sickness.
Such activities may result in accelerated entry into decompression which could cause serious
injury or death.
 Combining competitive type Free dive activities that involve multiple descents/ascents with
activities utilizing SCUBA during the same 24 hour period is not recommended. Presently, there
is no data relating to such activities.
 It is highly recommended that anyone planning to become involved in competitive type Free
dive activities obtain proper instruction and training from a recognized Free Diving trainer. It is
imperative that the physiological affects be understood and the diver is physically prepared.
©2002 Design, 2006 Doc. No. 12-2732-r01 (8/1/06)
Error Surface Error Dive