Oceanic VT 4.0, Operating Manual

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VT 4.0 OPERATING MANUAL
© 2002 Design, 2011 Doc. No. 12-5213-r02 (9/6/11)
CONDITIONAL VIOLATION (CV)
Upon ascent above the required Deco Stop Depth, operation will enter CV during which no off gassing credit will be given,
meaning Deco Stop Time and TAT will not decrease.
The Audible will sound during which the alarm LED will flash. A Down Arrow will also flash (Fig. 56) until descent is made to
below the required Stop Depth, then it is removed.
• S (< 2 sec) to silence Audible.
> Other button operations and displays are similar to Deco.
If descent below the required Deco Stop Depth is made within 5 minutes, operation will resume in Deco with off gassing credit
given (Stop Time and TAT decrease).
DELAYED VIOLATION 1 (DV1)
Once above the Deco Stop Depth for more than 5 minutes, operation will enter DV1 which is a continuation of CV**.
The Audible will sound during which the alarm LED and full TLBG will flash. Two Down Arrows will flash (Fig. 57) until descent is
made to below the required Stop Depth.
> Button operations and displays are similar to Deco.
When descent below the required Deco Stop Depth is made, operation will resume in Deco with off gassing credit given (Stop
Time and TAT decrease).
**The difference between DV1 and CV is that DV1 causes operation to enter Violation Gauge Mode 5 minutes after surfacing
from that dive.
DELAYED VIOLATION 2 (DV2)
If the calculated Deco obligation requires a Stop Depth between 60 FT (18 M) and 70 FT (21 M), operation will enter DV2.
Upon entry into DV2**, the Audible will sound during which the alarm LED and full TLBG will flash. Two Up Arrows will also
flash until within 10 FT (3 M) of and below the required Stop Depth of 60 FT (18 M).
> Once within 10 FT (3 M) of and below the required Stop Depth, the full Stop icon (smaller Up and Down Arrows with Stop
Bar) will be displayed solid (Fig. 58).
> Button operations and displays are similar to Deco.
**The difference between DV2 and general Deco is that DV2 causes operation to enter Violation Gauge Mode 5 minutes after
surfacing from that dive.
DELAYED VIOLATION 3 (DV3)
Upon descent deeper than the MOD**, the Audible will sound during which the alarm LED will flash. Two Up Arrows and the
loaded segments of the TLBG will also flash, and Current Depth and Max Depth will only indicate 3 dashes ( - - - ).
**MOD is the Max Operating Depth at which the VT 4.0 can accurately perform calculations and display data.
MOD = 330 FT (99.9 M) in NORM and FREE modes.
MOD = 399 FT (120 M) in GAUG mode.
Upon ascending above the MOD, Current Depth will be restored, however, Max Depth will display 3 dashes for the remainder
of that dive. Also, the Log for that dive will display 3 dashes as the Max Depth.
DV3 MAIN, information includes (Fig. 59) -
> Current Depth as 3 dashes ( - - - ) with FT (or M) icon.
> Nx, (PZ+), CF icons - if they apply.
> (2) Up Arrows flashing, until at/above MOD.
> DTR as 3 dashes ( - - - ) with graphic NDC.
> Pressure with PSI (or BAR) and Link icons.
> Graphic GAS1 (or 2, 3, 4), one in use.
> ATR (up to 199 min) with icons.
> TLBG - flashing for the remainder of that dive.
> VARI while ascending.
• A (< 2 sec) to access ALTs, similar to No Deco.
• M (2 sec) to access Gas/TMT Switching*.
• S (< 2 sec) to activate Backlight or acknowledge alarms.
• S (2 sec) to access Compass*.
*These items can only be accessed while viewing the Main.
Fig. 56 - CV MAIN
Fig. 57 - DV1 MAIN
(during Audible)
Fig. 58 - DV2 MAIN
Fig. 59 - DV3 MAIN