We're overlapped on the same tack — can the leeward boat head up on me?
Yes, as long as she stays at or below her own proper course. Under Rule 11 the windward boat must keep clear of the leeward boat. Heading up to sail inshore out of the tide can be the leeward boat's proper course, so Rule 17 doesn't stop her — and the windward boat, with room and time to keep clear, must do so. (World Sailing Case 14.)
📖 Want Rule 11 in more depth? Elvstrøm Explains the Racing Rules 2025-2028 sets out every rule with plain-English explanations and diagrams. (affiliate link)
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<p><a href="https://sailing.kiwi.nz/v/Evjmr1VdIGU/">Source: Sailing Kiwi</a></p>Go deeper: books and gear
- Elvstrøm Explains the Racing Rules 2025-2028 — Every rule, with plain-English explanations and diagrams.
- The Rules in Practice 2025-2028 by Bryan Willis — Situations round the racecourse, worked through for the current rules.
- Sail telltales — Read the airflow over your sails.
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