Room to Pass an Obstruction
When boats pass an obstruction on the same side, the outside boat gives the inside overlapped boat room to pass between it and the obstruction.
An obstruction is anything a boat would have to make a substantial change of course to avoid — a shoreline, an anchored boat, or a right-of-way boat being kept clear of. When overlapped boats pass it on the same side, the outside boat must give the inside boat room to pass between it and the obstruction. Unlike a mark, the boats do not round it — they pass it.
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How it interacts with other rules
- Rule 18 — Mark-Room · see also
Rule 18 (mark-room) does not apply at an obstruction that is not also a mark; rule 19 governs instead.
- Rule 20 — Room to Tack at an Obstruction · see also
If the inside boat needs to tack to avoid the obstruction, rule 20 (room to tack) applies.