7. T-1/T-39 VNAV IN-FLIGHT PROCEDURES
7.1.1. While section 6 focused on mission planning for VNAV flight in the T-1/T-39, the
emphasis of this section is application of skills in-flight. Essentially, all of the lessons learned in
the T-34 phase still hold true when flying at half the altitude and twice the airspeed. There are
some additional challenges, however. Proper management of compensations and corrections is
even more critical as only six seconds of error can equate to ½ mile off course.
7.1.2. Some of the differences between T-34 and T-1/T-39 VNAV include:
18.104.22.168. Increased visibility requirements.
22.214.171.124. Less time to identify and analyze checkpoints and turnpoints.
126.96.36.199. Flights conducted at AGL altitudes rather than MSL altitudes.
7.2. ENABLING OBJECTIVES (AS NUMBERED IN CNATRAINST 1542.131)
2-3 Maintain or make recommendations to maintain a visual low level course given a specified
course within + 2 NM.
2-4 Identify visual low-level course intermediate checkpoints and turnpoints, given a specified
course, turnpoints 80% and intermediate checkpoints 50%.
2-5 Recommend airspeed adjustments to arrive on target on time in a visual low-level course,
given a target time and specified course, +/- 30 seconds.
2-6 Adjust or make recommendations to adjust preflight planned headings and airspeeds to
compensate for the effects of wind, given a target time and specified course, to within +/- 2° and
+/- 5kts of instructor calculated course and airspeed.
2-7 Determine wind direction and speed given a T-1A/T-39 mission to +/-30° and +/- 10kts.
7-9 Given a T-1/T-39 VNAV mission, make VNAV turnpoint, intermediate checkpoint, and
hazard calls using proper format and terminology without error.
7.3. NM ENABLING STEPS
2-3-1 Using previously constructed mission materials navigate a T-1A/T-39 aircraft
using basic navigation procedures and techniques.
2-5-1 Compute the correct indicated air speed to maintain 300 kts true airspeed using
outside air temperature.
2-7-1 Using preflight weather information and in-flight visual cues, recognize general
wind direction and velocity.
2-4-1 Using visual references determine aircraft position relative to course.