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 that a
course is not simply 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 (DH) On a precision approach the height at which a decision must be
made to either continue the approach or to execute a Missed Approach.
DEPARTURE CONTROL Air Traffic Control service provided to departing aircraft.
DIRECT Straight line flight between two NAVAIDS, fixes, points, or any combination
thereof. When used by pilots in describing offairway routes, points defining direct route
segments become compulsory reporting points unless the aircraft is under radar contact.
DISTANCE MEASURING EQUIPMENT (DME) Airborne and ground equipment used to
measure the slant range distance, in nautical miles, of an aircraft from the NAVAID.
DME FIX A geographical position determined by reference to a navigational aid. It is defined
by a specified distance in nautical miles and a radial in degrees magnetic from that aid. For
example: a point 10 NM west of the NSE VORTAC on the 270º radial would be written as:
NSE 270 010.
EMERGENCY FUEL A declaration made by the pilot to inform ATC that the aircraft fuel
status is dangerously low. The pilot is requesting priority handling and cannot accept any delays
for the approach.
EMERGENCY SAFE ALTITUDE An altitude expressed in 100foot increments providing
1000 feet of clearance (2000 feet in designated mountainous areas) over all obstructions/terrain
within 100 miles.
ESTABLISHED ON COURSE The aircraft can be considered "established on course" when
the aircraft position is within five radials of the selected VOR or TACAN course and the aircraft
movement is in the same direction as the selected course. An aircraft is established on an ILS or
Localizer course when the CDI needle is within 5 dots (221) and aircraft movement is in the
same direction as the course. (NOTE: This definition applies to Primary Instrument training
EXPECTED FURTHER CLEARANCE TIME (EFC) The time a pilot can expect to
receive clearance beyond a clearance limit.
FINAL APPROACH FIX (FAF) The fix from or over which final approach (IFR) to an
airport is executed.