RULE Lab
Wind shift — one lifts, one heads
A single right shift lifts the starboard boat toward the mark and heads the port boat away.
Two boats sail close-hauled when a right (clockwise) shift arrives. Watch the wind arrow swing and the boats turn with it: the starboard boat is LIFTED — its bow points closer to the mark — while the port boat is HEADED, pointing further off. Nothing is scripted per boat; both simply keep their angle to the wind, so the shift helps one and hurts the other. Flip the shift to the left (negative) and the roles swap.
Play this on the board
Opens the animation on the boat-length grid — scrub it, edit it, or use it as a starting point. Free, no account needed.
wind shiftliftheaderupwindkinematictactics
How it interacts with other rules
- Rule Lab — Wind shift — tack on the header · see also
The right response to a header: tack.
- Rule Lab — Kinematic beat — laylines, bias & shift · see also
Same idea with both boats laying the mark.