sight of a sail; distant sail
Refers to the visible shape or silhouette of a sail, typically seen from afar on the sea. Often used in literary or descriptive contexts.
We saw the sight of a sail on the horizon.
Compound of 帆 (ho, 'sail') and 影 (kage, 'shadow' or 'silhouette'). The reading ほかげ is a straightforward combination of the on'yomi of 帆 and the kun'yomi of 影.