Bashi Channel

The Bashi Channel separates Mavulis Island in the Batanes from Orchid Island off southeastern Taiwan. It is the main northern gateway of the Luzon Strait, carrying ships between the South China Sea and the Philippine Sea. Its average width is about 185 kilometres. Its broad open passage lies over a fractured seabed of shelves, ridges and deep trenches rather than a single narrow channel.

The strait had already joined the worlds of southern Taiwan and the northern Philippines before European expansion into the region. Austronesian communities on Orchid and the Batanes crossed and exchanged with one another, and the similarity of their languages and oral traditions preserved the memory of those ties. The name Bashi entered European geography through William Dampier, who associated the Batanes with the drink called basi or palek.

Spain claimed the Batanes in 1686, while Dampier’s account a year later placed the passage within a growing European understanding of the region. Mariners still faced strong seasonal winds and storms, especially from June to December. The channel’s enduring importance came from this combination of cultural crossings, protected island approaches and a difficult but direct route between two major seas.