Head
The upper corner of a sail.
How to sign
Use Dominant 1-hand, palm down. The base or passive hand is Non-dominant flat-B: sail plane. Set the sail triangle. Start at the highest corner. Make a short, precise touch or point to that corner. Hold at the top corner; the sail locus distinguishes it from the body-part sign HEAD. Establish the sail triangle, then touch or point to its highest corner. Do not use the body-part sign HEAD without the sail locus.