DCHP-1 Online
current sail 
See quote.
- 1928 They evidently had a "current sail" out. . . . A current sail is made by dropping a piece of canvas under the boat with rocks tied to the two lower corners. The under-current catching this, will carry the boat against any wind. . . .
- 1928 They evidently had a "current sail" out. . . . A current sail is made by dropping a piece of canvas under the boat with rocks tied to the two lower corners. The under-current catching this, will carry the boat against any wind. . . .