Mark-Room — Overlap Too Late
A boat that was clear astern at the zone gets no mark-room from an inside overlap she obtains only after entering the zone.
Mark-room is locked in at the moment the first boat reaches the zone. A boat that was clear astern then is not entitled to mark-room even if she later ranges up and gets an inside overlap inside the zone (rule 18.2(a)(2) — and the giving boat's obligation continues even when a new overlap begins). The entitled boat keeps her room; the late boat must keep clear and round behind. To earn the inside, establish the overlap clearly before the zone.
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How it interacts with other rules
- Rule 18 — Mark-Room · see also
An overlap that exists when the first boat reaches the zone does entitle the inside boat to room.
- Rule 18.2 — Mark-Room — Clear Ahead at the Zone · see also
The other side of the same coin: clear ahead at the zone is entitled to room.
Related guide
- What is mark-room? Rule 18 explained simply
Mark-room is the room an inside boat is owed to sail to and round a mark under rule 18. Learn the zone, who owes it, and the common reversals.