-
AN/ASN-128 Self-contained Doppler navigation system
The AN/ASN-128 self-contained Doppler navigation system provides three axes of velocity, as well as a continuous navigation solution for present position. These systems compute distance, bearing and time to a selected destination, as well as track angle error and distance-off-course to assist in navigating to that destination.
AN/ASN-128 Features:
- Autonomous point-to-point navigation
- Accurate hover velocities
- Two-level maintenance
- No flight line test equipment
- Simple operation
- High reliability
- Low cost
- Built-in test
Steering Hover Indicator Unit (optional):
The Steering Hover Indicator Unit (SHIU) has two modes of operation.
In the navigation (NAV) mode, the SHIU provides the pilot with a display of ground speed, distance-to-go, and left/right steering information to the destination selected on the CDU.
In the hover (HOV) mode, the three pointers indicate the values of three orthogonal components of aircraft ground velocity (along heading, across heading, and vertical). By flying the aircraft to maintain these displayed values at zero, the pilot can hover the helicopter without visual reference to the ground.
