Running Fix - Two Observations

Estimate running-fix error at second observation from interval, own speed, and advance-method correction - sensitivity of the fix to course/speed change.

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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

\epsilon = \sqrt{(D \sin \epsilon_C)^2 + (D \epsilon_S)^2}

Symbol	Meaning	Unit
$D$	DR distance run	nm
$\epsilon_C$	Course error	deg
$\epsilon_S$	Speed error	%

Source: Bowditch Pub.9 Ch.23

In short

Estimate running-fix error at second observation from interval, own speed, and advance-method correction - sensitivity of the fix to course/speed change.

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