Operation Manual

VT 4.0 OPERATING MANUAL

DECLINATION

Magnetic Declination is taken from numbers provided on maps or charts that apply to a speciﬁc location. The numbers represent

the easterly or westerly angular difference (Declination) in degrees between magnetic North and true (geometric or polar) North.

A Compass will point to magnetic North unless its reference is adjusted to true North prior to conducting activities.

Declination Menu, information includes (Fig. 125) -

> Graphics SEt and MENU, with selections -

> OFF.

> DECLIN EAST + .

> DECLIN WEST - .

• A (< 2 sec) to step forward (down) through Menu selections.

• M (< 2 sec) to step back (up) through Menu selections.

• S (< 2 sec) when the pointer icon ( > ) is next a selection to select it.

> If OFF is selected, Declination is set for 0° and operation reverts to the Compass Menu.

> If DECLIN EAST (or WEST) is selected, that graphic will ﬂash and the numeric value with ° icon will ﬂash in place of the

graphic MENU (Fig. 126).

• A (< 2 sec) to increase Set Points one at a time from 0 to 45° in increments of 1°.

• A (hold) to increase Set Points at a rate of 4 per second.

• M (< 2 sec) to decrease Set Points one at a time.

• S (< 2 sec) to save the Set Point and revert to the Set Declination Menu.

ALARMS

When most Alarms strike, operation in Compass Mode will be terminated and the Dive Main will be displayed indicating the

alarm condition. Compass Mode can then be reentered by pressing S (2 sec).

During several types of alarms, indication will be given while remaining in Compass Mode without interuption. They are -

Ascent Alarm (Fig. 127) -

> VARI, all segments ﬂashing until slowed.

Depth Alarm (Fig. 128) -

> Depth digits ﬂashing until < alarm depth set.

Loss of Link (Fig. 129) -

> Link icon on ﬂashing until Link is regained.

Fig. 125 - SET DECLINATION

Fig. 126 - SET DECLIN

Fig. 127 - ASCENT ALARM

Fig. 128 - DEPTH ALARM

Fig. 129 - LOSS OF LINK