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EMERGENCY NAVIGATION CARD
A handy card to have on board in
case your sight reduction system, sextant, or almanac becomes lost. The
card is loose-leaf sized. You can punch holes in it if desired for insertion
in a binder. It is plastic laminated for weatherproofing and durability.
A wealth of information is provided on it in addition to: an emergency
almanac for the sun, and declination tables for the stars; several methods
for accomplishing sight reduction, including one that requires only the
card itself; and angular markings on the perimeter of the card that allows
approximate altitude measurements of celestial bodies. Other information
includes how to steer by the stars and finding your boat's speed. We think
it's a bit over-priced but might prove invaluable in a lifeboat situation.
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