UM8 and UM10, overlapped on port tack with UM8 inside, approached a leeward mark to be left to port and subsequently rounded it as shown in the diagram. The next leg was a beat to windward. The wind was moderate and the seas negligible. UM8 protested UM10 under rule 18.2(a)(1) for not giving her room to sail to the mark and round it. The protest committee decided that UM10 did give UM8 the room she was entitled to and denied the protest. UM8 appealed.

In order to sail the course, it was necessary for UM8 to change course from a broad reach to a close-hauled course as she rounded the mark. Therefore, her proper course was to sail close to the mark at some point in her turn. Because UM8 was entitled to mark-room, she was entitled to room, as defined by the definition Room,

‘Room’ in the phrase ‘room to sail to the mark’ means space to sail promptly in a seamanlike way to a position close to, and on the required side of, the mark. In this case, UM8 had sailed to the mark at position 3 in the diagram because the mark was abeam of her bow and she was close to the mark. Between positions 3 and 5 she was rounding the mark and, therefore, entitled to room to turn promptly in a seamanlike way from a broad reach to a close-hauled course. At position 5 she had been given room to round the mark and room to leave it astern. Therefore, UM10 gave UM8 the room to which she was entitled under rule 18.2(a)(1). 

UM8’s appeal is dismissed, and the decision of the protest committee is upheld.

USA 2011/105;revised by World Sailing 2025