Use this sailing calculation as a planning or educational cross-check for navigation, wind and current, rig loads, stability, anchoring, tides, visibility, performance, or recovery under explicitly stated conditions.

Maneuver count

Number of maneuvers performed.

Boat speed (kt)

Boat speed through the water.

Seconds per maneuver

Seconds lost for each maneuver.

Compute the total time and distance lost to a series of maneuvers from the maneuver count, seconds lost per maneuver, and boat speed. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Time loss (s)

Total time lost to the maneuvers.

Distance lost (nm)

Distance equivalent of the lost time.

• Actual conditions change with vessel design and loading, sea state, wind, current, tide datum, weather, chart accuracy, equipment, crew, regulations, and safety margins. Simplified formulas do not replace seamanship, approved stability data, or current navigation information.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Cross-check official charts, tide and weather services, instrument data, vessel manuals, and collision regulations; maintain conservative margins and a safe alternative plan.

• Gybe Loss Distance

  Estimate the distance lost to gybing from the number of gybes, boat length, and boat lengths lost per gybe.

• Tack Loss Distance

  Estimate the distance lost to tacking from the number of tacks, boat length, and boat lengths lost per tack.

• Time to Start Line Calculator

  Calculate how many minutes it takes to reach the start line from the remaining distance and current boat speed.