Patent ID: 9422051
Filing Date: 2016-08-23
CPC Classification: B64C,G01C,G02B,G05D

Claim Text:
1. A hover hold aid system for a helicopter, the system comprising: a helmet-mounted visualization system comprising a helmet posture detection device and a helmet-mounted display incorporated in a helmet of a pilot of the helicopter, wherein the helmet-mounted visualization system determines a current position of the helicopter in relation to a terrestrial frame of reference, and the helmet-mounted display generates symbols at fixed virtual positions in relation to the terrestrial frame of reference, the symbols being displayed when the symbols are situated in an angular field of display of the helmet-mounted display; wherein, when the helicopter has to home or be held in a vicinity of a predetermined position in the terrestrial frame of reference, the helmet-mounted visualization system calculates a first representation containing a first target and a second representation containing a second target, the first and second targets being referenced in the terrestrial frame of reference, the first target located in a direction of a homing course to the predetermined position, the second target located in a perpendicular direction to the homing course, the direction of the homing course and the direction perpendicular to the homing course being referenced in relation to the current position of the helicopter, one target alone being displayed at any time, depending on an orientation of the helmet.