• 32 points of a compass = 360 degrees

  • 1 point of a compass = 11.25 degrees

  • To convert degrees C. to degrees F., multiply by 9, divide by 5 and add 32

  • To convert degrees F. to degrees C., deduct 32, multiply by 5 and divide by 9

  • 1 inch = 2.54 centimeters

  • 1 foot (U.S.) = .3048 meters = 1 British foot

  • 1 kilometer = 3,280.8399 feet = .5399568 nm

  • Statute mile = 5,280 ft = 1.609 km = .869 nm

  • Nautical mile = 1.15 stat miles = 1,852 m = 6,076.12 ft = about 2,000 yds
    (generally accepted as 1 minute of latitude)

  • Length of 1 minute of latitude at equator
    = approximately 6,046 ft

  • Length of 1 minute of latitude at poles
    = approximately 6,108 ft

  • Knot = 1 nm/hr = 1.15 mph = 1.852 km/hr

  • Knot-furlong = time it takes to sail 220 yards at 1 nautical mile per hour

  • Fathom = 6 ft = 1.829 m

  • Cable = 720 feet = 120 fathoms

  • Cable (British) = .1 nm

  • 7.5 cables = 1 statute mile

  • 8.44 cables = 1 nm

  • Charts - nautical miles per inch = reciprocal
    of natural scale/72,913.39

  • Charts - statute miles per inch = reciprocal
    of natural scale/63,360

  • Charts - inches per nm = 72,913.39 x natural scale

  • Charts - inches per sm = 63,360 x natural scale

  • Charts - natural scale = 1:72,913.39 x nm/inch

  • Charts - natural scale = 1:63,360 x sm/inch

  • Std. atmospheric pressure at sea level = 29.92126
    inches of mercury

  • millibar = .02952998 inches of mercury

  • millimeter of mercury = 1.3332237 millibars

  • register ton = 100 cubic feet

  • measurement ton = 40 cubic feet = 1 freight ton

  • 1 barrel (42 gals) of diesel fuel = 315 pounds

  • 1 gallon of engine motor oil = 7.3 pounds

  • 1 cubic foot = 7.481 gals of water

  • cubic foot of seawater = 64 lbs

  • cubic foot of freshwater = 62.428 lbs @39.2
    degrees F. (temp. of max. density)

  • 1 cubic foot of normal storage ice = 62 lbs

  • Speed of sound is approximately 1,117 feet per second

  • Approximate distance (nm) of a flash of light to resulting sound = elapsed time divided by 5.5

  • 1 displacement ton = 35 cubic feet of seawater = 1 long ton

  • 1 ton of freshwater=35.84 cubic feet

    (Note: some values above are based upon relationships
    enumerated in Bowditch's American Practical Navigator,
    Vol. I, 1984)

    And finally, just for the fun of it...

    • Ratio of an igloo's circumference to its diameter = eskimo Pi

    • 2000 pounds of Chinese soup = Won ton

    • 1 millionth of a mouthwash = 1 microscope

    • Time between slipping on a peel and smacking the pavement = 1 bananosecond

    • Weight an evangelist carries with God = 1 billi-gram

    • 16.5 feet in the Twilight Zone = 1 rod serling

    • Half of a large intestine = 1 semicolon

    • 1000 pains = 1 kilohurtz

    • Basic unit of laryngitis = 1 hoarsepower

    • 1 million microphones = 1 megaphone

    • 1 million bicycles = 2 megacycles

    • 2000 mockingbirds = two kilomockingbirds

    • 1000 milliliters of wet socks = 1 literhosen

    • 1 millionth of a fish = 1 microfiche

    • 100 rations = 1 C-ration

    • 2 monograms = 1 diagram

    • 8 nickels = 2 paradigms

    • 2.4 statute miles of intravenous surgical tubing at Yale University Hospital = 1 I.V. League

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