HOV — HOVER/VELOCITY HOLD MODE
The HOV mode utilizes the blended AHRS-GPS ground velocity information
to provide commands that maintain longitudinal and lateral aircraft ground
velocities for hovering and low speed flying.
The HOV can be manually engaged by pressing the HOV push button on the
Guidance Controller or by pressing the beep trim switch (fifth position) on the
cyclic hand-grip down.
At the engagement the HOV mode velocity references are set to zero. The
engagement of HOV mode will automatically engage RHT mode if a valid
radar altimeter signal is available and within the threshold limits.
The HOV mode velocity references may be changed by the pilot using any
of the following means:
• pressing the cyclic FTR switch, flying to the desired lateral and
longitudinal velocities and then releasing the cyclic FTR switch
• pressing the cyclic beep switch forward, aft, right, or left to increase the
velocity reference in the direction of the switch press
• pressing the cyclic beep fifth position switch to promptly zero the
velocity reference
The HOV mode velocity references are limited to a maximum of 60 knots
forward and 40 knots left, right, and aft (while aft the velocity reference is
limited to 40 knots total vector amplitude).
CAUTION
IN ALT MODE THE VOICE MESSAGE “ALTITUDE ALTITUDE” IS
TRIGGERED WHEN ALTITUDE EXCEEDS THE REFERENCE
ALTITUDE BY ± 150 FT. THEREFORE, IF ALT MODE IS
ENGAGED AS AN ALTERNATIVE TO RHT AT A HEIGHT BELOW
300 FT, SET DH AT A VALUE 10 FT BELOW THE REFERENCE
HEIGHT IN ORDER TO HAVE AN ADDITIONAL HEIGHT
DEVIATION EXCEEDANCES CUE.
CAUTION
THE HOV MODE MAINTAINS A GROUNDSPEED REFERENCE
THEREFORE PILOT MUST ENSURE THAT CROSSWIND AND
REAR WIND SPEED LIMITS ARE NOT EXCEEDED. IF WIND
LIMITS ARE EXCEEDED DIRECTIONAL CONTROL MAY NOT BE
MAINTAINED.
CAUTION
WHEN HOV MODE IS ENGAGED ABOVE 2000 FT AGL THE ALT
MODE DOES NOT AUTOMATICALLY ENGAGE. THEREFORE
THE PILOT MUST CONTROL COLLECTIVE MANUALLY OR
ENGAGE ALT MODE.
The hover symbology automatically appears on the PFD when HOV mode is
engaged. The display shows the aircraft velocity vector and the reference
velocity symbol.