Oceanic Data Mask Operating Manual - page 75

75

ATR, identified by the ATR icon, is displayed digitally at the

lower/left of the MAIN Dive screen (Fig. 63a).

In the event that ATR becomes less than NDC and O2 Time, it

will be displayed on the Main Display as Dive Time Remaining

(DTR) until it becomes greater than one or the other.

Air Time Remaining (ATR) Alarm

When ATR decreases to 5 minutes (0:05), the Audible Alarm will

sound and the ATR value (lower/left) will flash.

If ATR decreases to 0:00, the Audible will sound again.  The

message Atr will flash in place of DTR (Fig. 64) until ATR

becomes greater than 5 minutes (0:05).

You should immediately initiate a controlled Ascent while moni-

toring your Tank Pressure.  However, there is no reason to

panic, the DataMask has allowed for the Air necessary for a

safe Ascent including the No Deco Safety Stop, if set On, and

any Decompression Stops required.  Example:

  You set the End Pressure Alarm for 300 PSI (20 BAR)

  You are at a Depth of 60 FT (20 M)

  Air Time Remaining decreases to 0:00

  You Ascend at a maximum rate of 30 FPM (10 MPM)

  You surface with 300 PSI (20 BAR) pressure still in your

Tank.

Fig. 63  - MAIN DIVE

DISPLAY

a

Fig. 64  - ATR ALARM