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Mariner Math

Speed / Time / Distance
One minute of Latitude = One nautical mile
Distance in nautical miles / Speed in Knots = Time in hours
Speed in Knots x Time in hours = Distance in nautical miles

Fuel Consumption
Start at idle and increase speed every 100 rpm.
The point at which the bow starts to rise will be the high end of its best economical speed. Anything above that speed and fuel consumption begins to increase dramatically.

Gallons of fuel used per hour / Speed in Knots = Gallons per mile
Use at least 20 percent of fuel capacity for safety reserve.

Units
1 Gal = 3.78 Liters
Liters to Gallons: L / 3.78 = G
Gallons to Liters: G x 3.78 = L
1 nm = 2024 yds 1 Statute Mile = 1760 yds
NM to SM: nm / .869 = sm
SM to NM: sm x .869 = nm

1 Gal Fresh Water = 8.3 lbs
1 Gal Salt Water = 8.5 lbs
1 Gal Fuel = 6.2 lbs
1 CuFt = 7.48 Gal

1 meter = 3.2 ft
1 meter = 1.093 yds
Meters/sec to Kts: m x 1.093 x 60 x 60 / 2024 = kts
Meters to feet: m x 3.2 = ft

1 Fathom = 6 ft
1 Shot = 90 ft.

Temperature: C = 5/9 (F-32) F = 9/5 (C+32)
Speed of Waves = 3.03 x wave period in seconds
Wave length = 5.12 x Period squared
Speed of Wind driven water current = .03 x Wind Speed
Speed of Sound in Air = 761.22 mph
Speed of Sound in Water = 3371.85 mph

Pressure
Standard at Sea Level: 14.223 psi
Underwater Pressure = .434 x Water depth in feet


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