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15 results for “marine”

Formulae (15)

v = 1.34\sqrt{L}

Theoretical top displacement speed in knots from waterline length in feet.

v = \frac{d}{t}

One knot is one nautical mile per hour.

d_{km} = 1.852\, d_{nm}

Convert nautical miles to kilometres.

F_b = \rho g V

Upward force equals the weight of displaced water.

\Delta = \rho V

A floating ship displaces its own weight in water.

T = \frac{\Delta}{\rho\, A_w}

Depth of hull below waterline from displacement and waterplane area.

Fr = \frac{v}{\sqrt{gL}}

Ratio of inertia to gravity waves; governs hull resistance.

d = R\arccos(\sin\phi_1\sin\phi_2 + \cos\phi_1\cos\phi_2\cos\Delta\lambda)

Shortest distance between two points on the globe.

t = \frac{d}{v}

Voyage time from distance and speed over ground.

S = \frac{L}{d}

Ratio of anchor rode paid out to water depth.

GM = KM - KG

Stability measure; positive GM means the ship rights itself.

v = \sqrt{\frac{g\lambda}{2\pi}}

Speed of ocean waves in deep water from wavelength.

F = c\, v^3

Fuel burn rises with the cube of speed for a ship.

DWT = \Delta_{loaded} - \Delta_{light}

Cargo-carrying capacity: loaded minus empty displacement.

d = 60 \times \Delta\phi

Nautical miles between two latitudes on the same meridian.