General Seamanship

Conversions:

1 knot = 1.150779 statute miles per hour
1 statute mile per hour = 0.868976 knot
1 nautical mile = 1 knot  (knots NOT expressed as kts/hr)
1 statute mile = 0.868976 nautical miles
1 nautical mile = 1.150779 statute miles
1 kilometer = 0.621371 statute miles
1 statute mile = 1.609344 kilometers
1 foot = 0.3048 meters / 1 meter = 3.28084 feet

1 minute of latitude = 1 nm
1 degree of latitude = 60 nm
1 degree of long (mileage) decreases as lat increases

Humidity calculator (GO THERE)
Fahrenheit to Celsius Converter (GO THERE)
32 F =  0 C
50 F = 10 C
60 F = 15.5 C
70 F = 21.1 C
80 F = 26.7 C
90 F = 32.2 C