DGCA RTR(A) Part 1 flashcards
DGCA RTR(A) Part 1 · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- MAYDAY
- International distress signal, transmitted three times, used when an aircraft is threatened by serious or imminent danger and requires immediate assistance.
- PAN PAN
- Urgency signal, transmitted three times, used when an aircraft has an urgent condition affecting safety but does not require immediate distress assistance.
- ROGER
- Indicates that the entire transmission was received in full. It does not mean agreement, and it does not replace any required read-back.
- WILCO
- Means 'I understand your message and will comply with it'. It combines understanding with compliance and may be used to acknowledge instructions.
- STANDBY
- Instruction to wait; the station will call back. It does not authorise any action and the pilot must remain on the frequency.
- SAY AGAIN
- Request to repeat the whole transmission; if only part is needed, the request should specify the portion, such as 'say again the level'.
- CORRECTION
- Spoken before the corrected portion of a message. The corrected version supersedes the earlier content and must be read back if applicable.
- Phonetic alphabet Alfa Bravo
- ICAO spelling alphabet words for A and B; each letter of a call sign is spoken as its full spelling word, never as a spoken word.
- Read-back requirement
- Full read-back is required for route clearances, runway-in-use, level, heading, speed, altimeter, SSR codes, and conditional clearances; acknowledge with call sign.
- Conditional clearance
- Clearance prefixed by a condition, e.g. 'AFTER the landing traffic, line up'. The condition must be repeated in the read-back.
- Line up and wait
- Authorises the aircraft to enter the runway and hold position. It is not a take-off clearance; take-off requires 'cleared for take-off'.
- Cleared for the option
- Permits touch-and-go, stop-and-go, or full-stop landing at the pilot's discretion, subject to the runway being clear.
- Flight level definition
- Pressure altitude referenced to 1013.2 hPa, expressed in hundreds of feet, e.g. FL 250 means 25,000 ft on the standard pressure setting.
- Squawk 7700
- SSR code selected to indicate an emergency. It alerts ATC and triggers assistance; the assigned discrete code should be read back.
- Squawk 7600
- SSR code indicating radio communication failure. It is selected when two-way radio contact is lost and the lost-communication procedure is followed.
- Squawk 7500
- SSR code indicating unlawful interference, such as hijacking. Selection alerts ATC without further voice communication.
- Speed and heading instructions
- Heading and speed instructions issued by ATC must be read back in full, including the aircraft call sign, before the pilot complies.
- VHF airband range
- Civil VHF airband covers 118.000 to 136.975 MHz. It is line-of-sight, so usable range increases with aircraft altitude.
- 8.33 kHz spacing
- Channel spacing splitting each 25 kHz channel into three. Channel names reflect the 8.33 kHz frequency and must be read back accurately.
- VOR radial
- The magnetic bearing from the VOR station to the aircraft, displayed on the OBS or HSI; it is not the aircraft heading.
- DME slant range
- Distance in nautical miles measured along the line from the aircraft to the ground station; it exceeds true ground distance at high altitude.
- ILS localiser
- Provides lateral guidance to the runway centreline, transmitted in the 108.10 to 111.95 MHz band; glideslope is paired automatically.
- Mode C transponder
- Transmits identity plus pressure altitude referenced to 1013.2 hPa, allowing ATC to display the aircraft's level without voice reporting.
- Mode S address
- A unique 24-bit aircraft address enabling selective interrogation, data link, and improved surveillance without overlapping replies.
- Squelch setting
- Suppresses receiver noise between transmissions. Set it just above the point where background noise disappears, but not so high that weak signals are lost.
- 121.5 MHz
- International aeronautical emergency frequency, monitored by ATC and search and rescue; used for distress and diversion communications.
- RTR(A) licence
- Aerodrome/aircraft radio telephone licence for aircraft station operators, issued under the RTR Rules, 2025; distinct from RTR(C) and RTR(G).
- Part 1 and Part 2
- The written examination (Part 1) and practical test (Part 2) must both be passed before the RTR(A) licence is granted.
- Licence validity
- The RTR(A) licence is valid for the period specified in the Rules, commonly five years, and must be renewed before expiry with the prescribed application and fee.
- Standard phraseology rule
- ICAO standard phraseology must be used; plain language is permitted only when standard phraseology is inadequate, and must be clear and unambiguous.
- Radio discipline
- No unnecessary transmissions, no profanity, and no unauthorised use of the frequency; the licence holder is responsible for maintaining discipline.
- Produce licence on demand
- The licence holder must produce the licence on demand to an authorised officer; operating without a valid licence is an offence under the Rules.