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Navigation Arctic Ocean
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The North Pole is easier to navigate than the
South. Ridges and rubble provide waypoints and
contrast even in foul weather. It is enough to
carry the compass in your pocket, as you will
only have to bring it out from time to time. Yet
ice drift, leads, rubble and ridges will deviate
you from your point of direction. It is important
to keep waypoints far on the horizon in order to
not get lost in the maze of the Arctic ocean.
A good strategy is to climb up an ice ridge prior
to travel - a k a “scouting” - and a few more
times through the day. It will give you an
overlook of the terrain and help you to avoid
large leads and ridges.
Another problem unique to the North Pole is the
dense fog. This grey and dull blanket of damp air
is a spooky sight. Ridges, ice pinnacles and ice
boulders will emerge out of the fog like ghost
ships at sea. Open leads will show their black
grin just as you are on top of them and thin ice
will be difficult to spot in time. Fog is mainly
a problem of the late season around May. The
large areas of open water vaporize into low
clouds that cover the area almost permanently.
Apply the rules of South Pole whiteout navigation
when in North Pole fog. Same rules apply for the
Arctic, except the sun and the shadow will move
the opposite way. If facing the North Pole your
shadow will travel from left to right during the
day. At 12.00 PM the shadow will point directly
towards the North Pole.
"Fast ice" or “screw ice” is solid pack ice. This
old ice is often rugged with old sastrugis
smoothed at the edges by the wind. "Pack ice" or
“new ice” is floating ice formed by frozen
seawater. "Ice floe" is a flat chunk of pack ice,
also called “pan”. “Ridges” or “Hummocks” is a
place where pans of pack ice have piled atop one
another.
Thin and dangerous ice is commonly black, whilst
thick, old, frozen and safe ice is light in
color. Check ice safety by poaking it with the
ski pole. One poke – too thin. Three pokes before
going through the ice is fine. Two pokes – be
prepared to possibly fall through and move fast.
Thin ice piled up into ridges is easily
recognized by a brilliant blue or green color.
Pressure ridges are sometimes only low “fences”
between pans, but can tower up to 15 meters at
places of particular disturbance. |
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