Oceanic VT 4.0, Operating Manual

12

VT 4.0 OPERATING MANUAL

© 2002 Design, 2011

Doc. No. 12-5213-r02 (9/6/11)

FLY/DESAT

FLY Time is a count down timer that begins counting down 10 minutes after surfacing from a dive from 23:50 to 0:00 (hr:min).

DESAT Time, also a count down timer, provides calculated time for tissue desaturation at sea level taking into consideration the 

Algorithm used and the Conservation Factor setting.  

DESAT Time also begins counting down 10 minutes after surfacing from a dive, counting down from 23:50 (max) to 0:00 

(hr:min). 

When the DESAT time reaches 0:00, which will generally occur prior to the FLY count down reaching 0:00, it will remain on the 

display until the FLY count down reaches 0:00.

>  DESAT is not displayed after a Gauge or Violation dive.

>  Desaturation requiring Times greater than 24 hours will display 23: - - .  

>  In the event that Time to Desaturate still remains at the end of 24 hours, the added time will be zeroed.

>  When other screens are accessed, the FLY and DESAT countdowns continue in the background.  

Fly/Desat,

 information includes (Fig. 10):

>  Graphics FLY and DSAT with countdown times (hr:min) and Time (clock) icon, dashes if no dive yet.

•  S (< 2 sec) to revert to Main Menu.

NORM PLAN MODE 

No Deco time Limits (NDLs) and O2 time Limits (OTLs) in Plan Mode are based on the Algorithm selected (DSAT or PZ+), the FO2 

set for Gas 1, and residual nitrogen (or O2) remaining from previous NORM (or FREE) dives.  FO2 set for other Gases are not 

used for Plan calculations. 

PDPS (Pre Dive Planning Sequence)

Plan screens will sequence through Depths from 30 to 190 FT (9 to 57 M), or the Max Depth that will allow theoretical No Deco 

Dive Time of at least 1 minute based upon the previous dive profiles in a series of repetitive dives and taking into account descent 

and ascent rates of 60 FPM (18 MPM).

When the Conservative Factor is set On, NDLs are reduced to the values of the next 3,000 foot (915 meter) higher Altitude.  

Refer to tables in back.  

PDPS,

 information includes (Fig. 11A/B):

>  Plan Depth value with FT (or M) icon.

>  Nx and (PZ+) icons, if they apply.

>  Max Depth allowed with FT (or M) and MAX, if Nx.

>  Graphic NDC (or OTL) with Dive Time allowed (min). 

>  Graphic GAS 1 with FO2 icon.

>  Graphic AIR; or PO2 alarm value set with icon and FO2 Nitrox value set, if Nx. 

•  A (hold) to scroll forward through screens at a rate of 4 per second increasing planned Depth from 30 to 190 FT (9 to 57 

M) in increments of 10 FT (3 M).

•  A (< 2 sec) to step forward through screens.

•  M (< 2 sec) to step back through screens.

•  S (< 2 sec) to exit and revert to the Main Menu.

NORM/GAUG LOG MODE

Information from the latest 24 NORM and/or GAUG dives is stored for viewing.  After exceeding 24 dives, the most recent dive 

is stored while the oldest is deleted. 

>  Dives are numbered from 1 to 24 starting each time NORM (or GAUG) Dive Mode is activated.  After 24 hours elapse with 

no dive, the first dive of the next period of operation is #1.

>  10 minutes after a dive, the Log screens for all dives stored can be viewed.

If a dive’s elapsed time (EDT) exceeds 599 (min), data at the 599 interval is recorded in the Log upon surfacing of the unit.

Main Menu >> Log Menu >> Dive >> Data 1 >> Data 2 >> Data 3.

Log Menu,

 information includes (Fig. 12):

>  Graphics LOG and MENU with mode (book) icon.

>  Listing* of dives displaying - - Number (1 to 24), Date, and start Time; or graphics NO DIVES YET if a new unit.

*Up and Down arrows are not displayed at the right due to space limitations.

•  A (hold) to scroll forward (down) through the listing at a rate of 8 entries per second.

•  A (< 2 sec) to step forward (down) through the listing.

•  M (< 2 sec) to step back (up) through the listing.

•  S (< 2 sec) to access that dive's Log Data 1 screen.

•  S (2 sec) to revert to Main Menu.

Fig. 10 - FLY/DESAT

Fig. 11A - PDPS

(Gas 1 set for Air)

Fig. 11B - PDPS

(Gas 1 set for Nitrox)

Fig. 11C - PDPS

(times controlled by O2)

NORM.MAIN

MENU

SELECT

>

FLY/DESAT

PLAN

LOG

SET.MENU

OP.MODE

HISTORY

VT.4.0.ID

BATT/TMT

DIVE.PREVIEW

Press S (< 2 sec) to 

access Log Menu.

Fig. 12 - LOG MENU