What is "tankas"

Usage examples of "tankas".

He remounted the bridge, and guided the steamer through the flotilla of junks, tankas, and fishing boats which crowd the harbour of Hong Kong.

At the Victoria port he found a confused mass of ships of all nations: English, French, American, and Dutch, men-of-war and trading vessels, Japanese and Chinese junks, sempas, tankas, and flower-boats, which formed so many floating parterres.