User manual SUUNTO SK-7 DS MANUAL 2

[. . . ] The Suunto Combo modules and instruments can be combined in an almost infinite amount of combinations, and allow you to change or upgrade your combo configuration. The new combos consist of four main modules: the pressure gauge module, the instrument module and two different compass modules. [. . . ] 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. 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. · The dip and stratification of rocks on the shore can often be followed over large areas under water · Sand ripples usually form long lines parallel to the shore · The direction of currents should be noted by their effect on algae or drifting particles. Use the compass to check the bearing of the current 7 · In shallow water, the sun's direction can be seen from shadows on the bottom, or by looking towards the surface · Swimming in a straight line along the bottom is greatly facilitated if you can line up three distinctive objects in your line of vision. As you reach the first one, line up a new one farther away, so that you again have three points determining your course. This way you can counteract the effects of side current. Compass Balancing The horizontal and vertical components of earth's magnetic field vary considerably in different locations. If the compass is used in an adjacent balancing zone the compass needle will tilt only slightly. However, the farther the compass is used from it's intended zone, the more the needle will tilt. [. . . ] The tolerances for pressure gauges, measured at decreasing pressure are: At 40 bar ± 5 bar At 100 bar ± 10 bar At 200 bar ± 10 bar At 300 bar ± 10 bar 10 COPYRIGHT This publication and its contents are proprietary to Suunto Oy. Suunto, Wristop Computer, Suunto Combo, Replacing Luck and their logos are registered or unregistered trademarks of Suunto Oy. [. . . ]