Sailing start-line timing calculator

Calculate estimated time to line and arrival relative to start signal with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use estimated time to line and arrival relative to start signal to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Perpendicular distance to line (m)
100
Measured perpendicular closing speed (m/s)
3
Countdown to start (seconds)
40
Estimated time to line (seconds)
33.333333
Arrival relative to start signal (seconds)
-6.666667

Try another scenario

Perpendicular distance to line (m)
110.00000000000001
Measured perpendicular closing speed (m/s)
3
Countdown to start (seconds)
40
Estimated time to line (seconds)
36.666667
Arrival relative to start signal (seconds)
-3.333333
Calculation method

Calculation method

Estimated time to line (seconds)

Time=perpendicular distance/closing speed; positive relative arrival means after start.

Arrival relative to start signal (seconds)

Time=perpendicular distance/closing speed; positive relative arrival means after start.

Symbols and units
a
Perpendicular distance to line (m)
b
Measured perpendicular closing speed (m/s)
c
Countdown to start (seconds)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Constant closing speed, no maneuver, current or race-rule judgment. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Constant closing speed, no maneuver, current or race-rule judgment.
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