Suunto CB-71/STD Instruction Manual page 6

SUUNTO Console Compasses CB-71/SK-7/STD and CB-71/SK-7/DS
The CB-71/SK-7 is available in two versions: the CB-71/SK-7/STD for attachment on top of the combo modules or the
Cobra dive computer, and the CB-71/SK-7/DS for attachment on the back side of the CB-ONE module.
Compass use for divers
General instructions
Usually a compass must be held precisely in a horizontal position, otherwise the needle will sting. The SK-7 compass may
however be inclined about ±30 degrees.
Sighting a compass bearing
Hold the compass so that the compass is in a horizontal position and the direction line points away from you. Turn with the
compass until the direction line points at your destination, then turn the direction ring until the magnetic North needle is
aligned between the slit marks. The front end of the direction line on the SK-7 shows your compass bearing, and as long as
the North needle is aligned between the slit marks, the direction points toward your destination. The SK-7 compasses also
have a side reading window, which also enables you to take a bearing by directing the compass towards the destination
and by reading the compass bearing from the side window. This bearing can be memorized by turning the direction ring to
that bearing.
Setting a given bearing or direction
The scale division on the SK-7 is 360 degrees clockwise from 0 degrees at North. Turn the direction ring until the front end
of the direction line is at the desired direction. Turn the compass until the needle falls between the slit marks. The direction
line now points in the desired direction.
Magnetic declination
Maps and marine charts are drawn in correlation to the geographic poles, while the magnetic compass needle is subject to
magnetic declination which varies according to the location.
General orientation on the diving site
Before diving, check the main compass bearings at the dive site, paying special attention to memorizing the direction of the
shoreline and bearings of landmarks that may be of importance.
Natural aids to underwater navigation
• The underwater extension of the shore's inclination tells the diver if he is following the shoreline. Be careful however
as underwater ridges may lead you astray. Surface occasionally to check your position.
• The dip and stratifi cation of rocks on the shore can often be followed over large areas under water.
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