BASIC INSTRUMENTS FLIGHT PROCEDURES
The Basic Instrument Procedures and Patterns are intended to provide the student with a sound
basis for progressing to Radio Instrument navigation. The ability of the naval aviator to perform
proper instrument flight will transform periods of bad weather and low visibility from a liability
to an asset for the successful completion of military missions, especially when used in
combination with radio, radar, and target recognition devices.
INITIAL CLIMB TO ALTITUDE (ICA)
The initial climb to altitude (ICA) incorporates fundamental airwork into a sequence in
which the pilot is faced with continuous changes of altitude and heading, while maintaining a
constant airspeed. The ICA will be performed between assigned reversal headings and level off
Your instructor will make the field departure and climbout in accordance with course rules.
Once level at the base altitude, he/she will maintain straight and level flight in normal cruise
(150 KIAS). If not previously assigned, the instructor will assign reversal headings and the level
off altitude. When directed, position the instrument hood and commence the ICA as follows:
Switch oxygen white lever and report, "O2 normal."
Add power to 1015 ftlbs torque and monitor Inter Turbine Temperature (ITT).
Raise the nose slightly above the climbing attitude to 1215 degrees nose up. Trim
right rudder, nose up as the airspeed decreases.
As the airspeed approaches climb airspeed (120 KIAS), readjust the nose to the
climbing attitude (approximately 68 degrees nose up) and retrim.
Once established at 120 KIAS, start the turns by rolling into an AOB on the attitude
gyro equal to 10% of the airspeed (120 KIAS = 12º AOB). Once the attitude is set on
the gyro, commence wing position crosscheck on the turn needle for an exact one
needle width turn and a nose position crosscheck on the airspeed indicator for 120
Continue turns between assigned headings by making a smooth reversal from one
turn into another. Lead reversals by onethird the AOB, trimming the aircraft as
When within 200 feet of the assigned level off altitude, stop the turns on a heading
specified by the instructor and begin the level off by smoothly lowering the nose
towards the level flight attitude (about halfway towards the horizon) in order to both
accelerate and climb in the last 200 feet. Trim left rudder, nose down as the aircraft
BASIC INSTRUMENTS FLIGHT PROCEDURES 3-1