Appendix A Glossary - Cont'd

APPENDIX A

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

not desirable.

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

following advantages:

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

the approach.

A-2 GLOSSARY