T-45C TS INav-05
TACAN/VOR Navigation and Holding Procedures
The T-45C HSI takes the place of the RMI, CDI, and RNAV
remote display indicators of the T-34C.
Because the T-45C cruises about three times as fast as the
T-34C, you have a third of the time to anticipate changes.
Lead point calculation (LPC) is the distance, in nautical miles
or radials, that you must start (lead) a turn in advance of
intercepting a new course, radial, or arc. Your lead point
calculation must recognize both the aircrafts speed and
distance from the station. Distance between radials
decreases proportionally as you head towards the VOR/
TACAN station and increases proportionally as you head
away from the station.
The T-45C requires more distance to turn than does the
Holding is performed at max endurance airspeed.