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.

CE forward of CLR (m)

Signed distance from the centre of lateral resistance to the centre of effort, positive when the CE is forward.

LOA (m)

Length overall of the vessel.

Express the signed longitudinal separation between sail-plan center of effort and center of lateral resistance as a percentage of length overall. 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]

Balance percentage (%)

Signed separation percentage; interpret helm tendency with the vessel's coordinate convention and full sail-plan geometry.

• 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.

• Comfort Ratio Calculator

  Compute Ted Brewer's motion-comfort ratio from displacement, waterline length, and length overall. When LOA is omitted, it is assumed equal to LWL.

• Lead Percentage Calculator

  Compute sail lead as leadPercent = centroidDistanceMeters / waterlineLengthMeters * 100; signed distances allow the centroid to fall aft of the reference.

• Anchor Rode Length Calculator

  Compute the anchor rode length needed from water depth, freeboard, and scope ratio.