CAAP Instrument Rating Knowledge Exam key terms

The lowest altitude, expressed in feet above mean sea level, to which descent is authorized on final approach or during circling-to-land maneuvering when executing a non-precision approach, without the required visual reference.

A specified altitude in a precision or approach-with-vertical-guidance procedure at which a missed approach must be initiated if the required visual reference to continue the approach has not been established.

The point in the approach procedure at which a missed approach must be executed if the required visual reference has not been established; it may be defined by distance, a navigation fix, or a DA/MDA.

A published maneuver or series of maneuvers to be flown after initiating a go-around from an instrument approach, ensuring obstacle clearance and routing to a holding fix or alternate destination.

A predetermined racetrack-shaped maneuver flown to keep an aircraft within specified airspace while awaiting further clearance, comprising inbound and outbound legs with standard right turns unless left turns are specified.

A specified fix, NAVAID, or intersection over which the inbound leg of a holding pattern is flown, used as the reference for entry and timing of the pattern.

The prescribed method (direct, parallel, or teardrop) for entering a holding pattern based on the aircraft's heading relative to the holding fix and the direction of the pattern.

A holding pattern entry used when approaching from a sector that requires flying outbound at an angle, then turning to intercept the inbound course, typically with a 30-degree offset.

A holding entry where the aircraft flies parallel to the outbound leg on the non-holding side, then turns to re-intercept the inbound course, used when arriving from certain sectors.

A maneuver initiated after completing an instrument approach to align the aircraft with a runway not aligned with the final approach course, requiring visual contact with the airport environment and adherence to circling minima.

The lowest flight visibility required by a published instrument approach procedure for a pilot to legally descend below the MDA or DA and continue to land.

A precision approach system providing horizontal (localizer) and vertical (glide slope) guidance to a runway, along with marker beacons or distance information for position fixing.

The lateral guidance component of an ILS, transmitting on VHF frequencies between 108.10 and 111.95 MHz and providing course deviation information aligned with the runway centerline.

The vertical guidance component of an ILS, transmitted on UHF frequencies, providing a descent path typically angled at 3 degrees above the horizontal to the runway touchdown zone.

A low-power VHF (75 MHz) transmitter located at specific distances from the runway threshold, providing aural and visual indications of the aircraft's position along the approach path.

A marker beacon located approximately 4 to 7 nautical miles from the runway threshold, indicating the final approach fix for many ILS procedures.

A ground-based navigation aid transmitting on VHF frequencies (108.0-117.95 MHz) that provides magnetic bearing information from the station to the aircraft, enabling course guidance and position fixing.

A magnetic bearing extending outward from a VOR station, identified by its degrees from magnetic north, used by pilots to determine position and course relative to the station.

A transponder-based system that measures slant range distance from the aircraft to a ground station by timing the round trip of UHF radio pulses, usually paired with VOR or TACAN.

An instrument display showing the aircraft's lateral position relative to a selected navigation course, with a needle that deflects proportionally to the deviation from that course.

A combined navigation instrument that merges the heading indicator with a course deviation indicator, reducing pilot workload by displaying heading and course guidance in a single display.

A gyroscopic instrument that displays the aircraft's pitch and roll attitude relative to the horizon, providing the primary reference for instrument flight in visual reference-free conditions.

A gyroscopic instrument displaying the aircraft's heading relative to magnetic north, subject to precession and requiring periodic alignment with the magnetic compass.

A simulated or actual instrument flight condition in which one or more primary flight instruments (typically the attitude indicator, heading indicator, or both) have failed, requiring use of remaining instruments and alternate references.

The aircraft system that supplies ram air pressure and static pressure to the airspeed indicator, altimeter, and vertical speed indicator, enabling measurement of speed, altitude, and climb or descent rate.

A pressure instrument that displays aircraft altitude above a selected reference datum by measuring static pressure, with settings of QNH, QFE, or standard pressure (1013.25 hPa) depending on flight conditions.

The altitude above which pilots set the altimeter to standard pressure (1013.25 hPa) and reference flight levels, and below which local QNH is used for altitude reference.

A surface of constant atmospheric pressure referenced to standard pressure (1013.25 hPa) and separated from other such surfaces by specific pressure intervals, expressed in hundreds of feet.

The set of regulations governing flight under instrument meteorological conditions, requiring specific equipment, pilot qualifications, and air traffic control clearances for flight operations.

Weather conditions expressed in terms of visibility, distance from clouds, and ceiling that are less than the minimums specified for visual meteorological conditions, requiring instrument flight rules.

An authorization from air traffic control for an aircraft to proceed under instrument flight rules within controlled airspace, including route, altitude, and any restrictions or instructions.

A service provided by ground-based controllers who direct aircraft on the ground and through controlled airspace, issuing clearances and instructions to ensure safe and orderly traffic flow.

A four-digit octal code entered into the aircraft transponder by the pilot, as assigned by air traffic control, to identify the aircraft on radar displays.

An airborne radar beacon receiver and transmitter that automatically responds to interrogations from ground radar by transmitting an assigned squawk code and, when enabled, altitude information.

The specified fix on a non-precision approach where the final approach segment begins, typically marked by a navigation fix or outer marker, after which descent to the MDA is authorized.

The height above ground level of the lowest broken or overcast cloud layer, or the vertical visibility into an obscuration, used to determine whether conditions meet IFR or VFR criteria.

An aerodrome to which an aircraft may proceed when it becomes impossible or inadvisable to land at the intended destination, selected based on weather, fuel, and regulatory requirements.

The minimum quantity of fuel required to be carried beyond that needed for the planned flight, intended to cover contingencies, holding, and an alternate destination as specified by regulation.

A document filed with air traffic services specifying the aircraft, route, altitude, destination, alternate, and fuel endurance for a flight conducted under instrument flight rules.

A pilot's erroneous perception of position, attitude, or motion relative to the earth, often caused by conflicting vestibular and visual cues in degraded visual conditions, leading to loss of control.

A false sensation of pitch or attitude caused by linear acceleration or deceleration, such as the illusion of climbing during acceleration on takeoff, which can mislead a pilot in IMC.

The systematic pattern of eye movement and attention across flight instruments used to maintain aircraft control and situational awareness during instrument flight.

The effective use of all available resources, including crew members, equipment, and information, to achieve safe and efficient flight operations, emphasizing communication, teamwork, and decision-making.

The body of rules promulgated by the Civil Aviation Authority of the Philippines governing aviation operations, including pilot licensing, aircraft airworthiness, and instrument flight procedures within Philippine airspace.