Plane Sailing - D.Lat & Departure

Plane-sailing solution: difference of latitude (D.Lat) and departure from course and distance, valid for short distances (≤ 300 nm).

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\Delta \phi = D \cos C, \quad p = D \sin C

Symbol	Meaning	Unit
$D$	Distance	nm
$C$	Course (angle from North)	deg

Source: Bowditch Pub.9 Ch.24

Plane-sailing solution: difference of latitude (D.