also: つめびらきで
expression
at close reach; at close haul
Sailing term: sailing as close to the wind as possible while still making headway. The phrase is a set expression used adverbially.
See also: 詰め開き
ヨットは詰め開きで風上に向かって進んだ。
The yacht sailed close-hauled toward the windward side.
詰め開き is the noun form meaning 'close reach' or 'close haul'; 詰め開きで is the adverbial phrase 'at close reach'.
Compound of 詰め (tsume, 'pressing close') + 開き (hiraki, 'opening' or 'spread'), referring to the angle of the sails when close-hauled. The exact derivation is uncertain; the term is specialized sailing vocabulary.