T-6A INSTRUMENT NAVIGATION
CIRCLE-TO-LAND MANEUVER - A maneuver initiated by the pilot to align the aircraft with
a runway for landing when a straight-in landing from an instrument approach is not possible or is
CLEARANCE LIMIT - The fix to which an aircraft is cleared.
COMPULSORY REPORTING POINTS - Reporting points, which must be reported to ATC.
They are designated on aeronautical charts by solid triangles or filed in a flight plan as fixes
selected to define direct routes. These points are geographical locations, which are defined by
navigation aids/fixes. Pilots should discontinue position reporting over compulsory reporting
points when informed by ATC that their aircraft is in "radar contact."
COURSE - A magnetic direction to fly in relation to a radio navigational facility. Note, a course
is not only a magnetic direction over the ground. If flying inbound on a radial, the course is the
reciprocal of the radial. If flying outbound, the course is the same as the radial.
DECISION HEIGHT - With respect to the operation of the aircraft means the height at which a
decision must be made, using an ILS or PAR instrument approach, either to continue the
approach or to execute a missed approach.
DEPARTURE CONTROL - ATC service provided to departing aircraft.
DEPARTURE PROCEDURES - A preplanned and coded IFR departure route. It provides the
Graphic portrayal of departure route.
Reduces time delay and radio communications required to issue clearances.
Provides approved ATC departure route clearance in the event of radio failure.
DIRECT - Straight line flight between two NAVAIDs, fixes, points, or any combination thereof.
When used by pilots in describing off-airway routes, points defining direct route segments
become compulsory reporting points unless the aircraft is under radar contact.
DME FIX - A geographical position determined by reference to a NAVAID. It is defined by a
specified distance in NM and a radial in degrees magnetic from that aid. EXAMPLE: A point
10 NM west of the NSE VORTAC on the 270° radial would be written as: NSE 270010.
EMERGENCY SAFE ALTITUDE - An altitude expressed in 100-foot increments providing
1000 feet of clearance (2000 feet in designated mountainous areas) over all obstructions/terrain
within 100 miles.
EMERGENCY FUEL - A declaration made by the pilot to inform ATC the aircraft fuel status
is dangerously low. The pilot is requesting priority handling and cannot accept any delays for