AFI 11-2C-130v3 - BITS

AFI11-2C-130V3 23 APRIL 2012 151
11.8.1.1.3. At the time of the fix record, as a minimum, GMT, present position, true
heading, spot w/v, TAS, altitude and ETA to the next waypoint in AF Form 4116
Section IX, In-Flight Data.
11.8.1.2. After coast out, record current position every 30 minutes on AF Form 4116
Section VI, Fix/Computer Position.
11.8.1.2.1. Record the present position for the primary navigation solution.
11.8.1.3. Plot the current position every hour or within 10 minutes of crossing an oceanic
reporting point, whichever occurs first.
11.8.1.3.1. Record the GMT, current position of the primary navigation system, true
heading, spot w/v, TAS, altitude, ETA to the next waypoint, and corresponding deltas
(or Lat/Long) for all other navigation solutions.
11.8.1.4. Between recorded positions, record spot readings at regular intervals to allow
for calculating a DR in the event of a navigation system failure.
11.8.1.4.1. As a minimum, spot readings will include: time, heading, drift angle,
ground speed, spot w/v. The # block is used for spot TAS or for averaging
computations.
11.8.2. In the event of a navigation system failure (INU or GPS) full log procedures will be
implemented. If the navigation system failure is resolved, the navigator may resume log
procedures as outlined in paragraph 11.8.1.
11.8.2.1. Beginning at the last plotted position, compute a Dead Reckoning (DR) up to
the present position. A DR associated with the fix/MPP will be plotted on the chart prior
to plotting the position. The DR line will consist of: the GMT of the DR, averaged
ground speed, averaged true airspeed, averaged compass heading, and averaged drift
correction. Spin elapsed time versus ground speed to obtain total ground distance. Work
back from the average compass heading to obtain the true course. Plot the DR using true
course and ground distance.
11.8.2.2. Plot a fix/MPP at a minimum of once per hour. At the time of the fix/MPP
record the GMT, current position, true heading, spot w/v, true air speed, altitude and ETA
to the next point.
11.8.2.3. Alter Heading (A/H) lines are optional. If used, record the GMT, true course
worked forward to obtain a compass heading, spot w/w, spot drift, true airspeed, and
ground speed.
11.8.2.4. As soon as practical prior to coast-in, navigators will verify aircraft position by
either navigation aid fix or radar fix.
11.9. Celestial Procedures.
11.9.1. See AFPAM 11-216 for a comprehensive discussion of celestial concepts.
11.10. Deviation Check Procedures.
11.10.1. Heading checks should be computed in Section V of AF Form 4116. Mid-time
celestial heading checks may be recorded in the Section X. When a heading check is
performed based on INS/SCNS, note that in the pre-comp area of the deviation checks