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 effect of a side cur-
rent.
Using the compass under water
- Usually, a compass must be held precisely in
a horizontal position, otherwise the magnetic
needle will stick. However, the SK-5 com-
pass may be inclined about ±10 degrees
from the horizontal. In the SK-6 the allowed
inclination is approximately ±14 degrees and
in the SK-7 approximately ±30 degrees.
- Do not attempt to use the compass before
you come to rest and can align the compass
horizontally with the aid of a flat bottom, a
glimpse of the surface, your own bubbles
going up, or the pull of gravity. When doubt-
ful, as in darkness or very murky water, turn
the compass slowly right and left, checking
that the North needle swings freely, before
trusting your bearing.
- Swimming along the bottom, make use of
fixed points. Keep still until the needle set-
6