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LANDFALL AND ISLAND SURVIVAL 
In looking for land remember that cumulus clouds in an other- 
wise clear sky are likely to have been formed over land. Since 
they may have drifted from their original position steer to the 
windward rather than to the leeward of them. “Lagoon Glare,” 
a greenish tint in the sky caused by the reflection of sunlight 
from coral reefs, may often be seen from a long distance. It is 
often more easily noted by looking slightly to one side of the 
point rather than directly at it. Driftwood and floating plants 
are a good indication of land. Coral reefs often cause difficulty 
in landing and should be approached cautiously. The surf is not 
so great if you make your landing on the lee side of an island. 
Breaks in the reef are Indicated by calm gaps in the long line 
of breakers. If the pass is deep the color will be clear blue. 
If shallow it will be uniformly or blotchy brown. For navigation 
in shoal coral waters it is always desirable to have the sun 
anywhere except dead ahead. The ideal condition is to have 
the sun over one’s shoulder or even directly overhead. 
Men adrift, especially in northern latitudes, sometimes imagine 
they can see things which are not there, such as smoke, sails, 
ships, or land. This is a form of mirage, the same phenomenon 
that occurs in the desert, and if you experience it, it does not 
mean that you are out of your mind or even light-headed. 
If you land on an island which is not in enemy territory and 
has natives on it, the worst of your troubles are over; they 
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