Operation Manual

OC1 OPERATING MANUAL

ADDITIONAL INFORMATION PERTAINING TO FREE DIVE 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 models currently used in the OC1 are based on no decompression/decompression multilevel

repetitive dive schedules.

These algorithms do not take into account the physiological changes associated with the high pressures that

competitive type Free diving can expose a diver to.

Fig. 142A - FREE VIOLATION

(entry into Deco, during Aud)

Fig. 142B - FREE VIOLATION

(after Aud)

Fig. 143 - FREE VIOLATION

(6 sec on surface)

Fig. 141 - TLBG AL

High Nitrogen Alarms

When nitrogen increases to the caution level (4 segments), the Audible will sound during which time the TLBG and Up Arrow icon

will ﬂash on the Main (Fig. 141).

The Up Arrow icon remains on the display until on the surface.

In the event that nitrogen continues to increase and reaches the Deco level; all 5 TLBG segments, the Up Arrow icon, and the

graphic VIOL, will ﬂash (Fig. 142A) while the Audible sounds. NDC will be displayed as 0:00.

When the Audible is silenced, the TLBG is removed (Fig. 142B). The Up Arrow icon ﬂashes until on the surface and the graphic

VIOL ﬂashes (Fig. 143) until 1 minute elapses on the surface.

After 1 minute on the surface, the graphic VIOL alternates with FREE and dive computer operation locks into FREE Mode for 24

hours. Access to Watch and Compass will be as usual.

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.