On the Same Tack; Proper Course
A leeward boat that got its overlap from clear astern (within two lengths) may not sail above its proper course.
If a boat establishes a leeward overlap from clear astern within two hull lengths, then while the overlap lasts it must not sail above its proper course — it cannot luff the windward boat up. This stops a trailing boat from using a leeward overlap purely to push another boat off course.
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How it interacts with other rules
- Rule 11 — On the Same Tack, Overlapped · limited by
Limits the leeward boat's rule 11 right of way when the overlap began from clear astern.
- Rule 15 — Acquiring Right of Way · see also
Rule 15 also applies the instant the overlap (and right of way) is established.
Related guide
- Racing Rules of Sailing explained: a beginner's mental model
The Racing Rules of Sailing 2025-2028 keep boats apart and racing fair. Here's the mental model: right of way, keep clear, marks, the zone and penalties.