The patent relates to a landing aid whereby a ship has a helicopter landing area and a horizontal plane indicating member with a substantially flat upper surface mounted for angular movement about axes parallel and transverse to the length of the ship. The indicator member is mounted in such a position on the ship and the flat upper surface is of such a size as to be clearly visible to the pilot of a helicopter when landing on the area. Means are provided for maintaining the indicating member in a horizontal attitude.
Stabilized Horizon Plane System
1971
4 pages
Report
No indication
English