A complete, exam-focused study companion for CPL & ATPL student pilots covering identification plates, mark measurements, the Indian VT / VU / U system, certificate & register of aircraft, and modern aircraft leasing through GIFT‑City.
The colour code is consistent across the Ghost Aviator library:
Exact regulatory values are pinned like this — at least 50 cm — because the examiner tests the number, not the paraphrase.
Every aircraft has a "name badge" — a nationality mark that identifies the country of registry and a registration mark that identifies the individual airframe. ICAO Annex 7 is the international rulebook that tells States how to pick, size and display those badges.
Annex 7 sets out procedures for selection by ICAO Contracting States of nationality marks from the nationality symbols included in the radio call signs allocated to the States of Registry by the ITU.
Three international bodies interact:
An aircraft shall carry an identification plate inscribed with at least its:
The plate shall be made of fireproof metal or other fireproof material of suitable physical properties and shall be secured to the aircraft in a prominent position near the main entrance — or, for special cases:
The registration mark shall be letters, numbers, or a combination of letters and numbers consisting of 1 to 5 digits or characters, and shall be that assigned by the State of Registry or common-mark registering authority.
"Fireproof, near the main entrance, 1–5 characters." Three facts, three marks in the exam.
A registration mark must never be mistakable for a distress or urgency signal on the radio — otherwise a routine call could be read as a life-and-death broadcast.
When letters are used for the registration mark, combinations shall NOT be used which might be confused with:
| Signal | Meaning & Where It Comes From |
|---|---|
| SOS | The classic international distress signal. |
| XXX | An urgency signal — the radio-telegraphy equivalent of PAN (very high urgency without being an outright distress). |
| PAN | The radio-telephony urgency signal (spoken "PAN-PAN") — indicates a situation of urgency but not immediate danger. |
| TTT | The safety signal in radio telegraphy — precedes safety messages. |
| Q-Codes | Three-letter combinations beginning with Q (e.g. QNH, QFE, QDM) reserved for aeronautical procedure. |
In the question bank, the "example" the examiner picks for a forbidden combination will be one of XXX, PAN, TTT or SOS. Distractors like RCC, LLL, DDD are simply not on the list — but they are only wrong as examples, not as legal combinations.
Annex 7 fixes the minimum character height so that marks stay legible at range. The numbers are simple and heavily tested — learn them cold.
| Aircraft Type | Location | Minimum Height |
|---|---|---|
| Heavier-than-air | Wings | 50 cm |
| Fuselage (or equivalent structure) & vertical tail surfaces | 30 cm | |
| Lighter-than-air | All types except unmanned free balloons | 50 cm |
| Unmanned free balloons | Determined by the State of Registry based on payload size |
"Fifty on wings, thirty on the fuselage." Lighter-than-air airships and balloons follow the same 50 cm rule as the wings — because on those bodies the mark is the only mark visible.
Annex 7 sets the international rulebook; the CAR then bolts it into Indian law. Three practical items to know: who issues the Certificate of Registration, what it contains, and when the DGCA can pull it.
The authority empowered to register aircraft and grant the Certificate of Registration in India shall be the Central Government.
The certificate shall include the following:
Leased aircraft — additional entries: the certificate shall also include the validity of the lease and the names, nationalities and addresses of the lessor and the lessee.
The registration of an aircraft registered in India may be cancelled at any time by the DGCA, if satisfied that:
A register of aircraft registered in India shall be maintained by the Director-General and shall include the same particulars as those provided in the Certificate of Registration. The register shall be open to inspection by members of the public at such times and subject to such conditions as may be specified by the Director-General. The Register of Aircraft is also available on the DGCA website.
A Certificate of Registration is not time-limited. It remains valid from the date of registration until it is cancelled by the DGCA on one of the grounds above — not for a fixed year, and not merely until the aircraft is destroyed (destruction is one of several triggers, not the only one).
India's ITU allocation and its actual on-airframe practice are two different stories — a favourite examiner trap. Get both straight.
Air-Force example: VU-AWB • Unmanned example: UB67DFC (U + 6 alpha-numeric)
The nationality mark is followed by a hyphen and a registration mark consisting of 3 letters — e.g. VT-EPC or VU-AWB — in Roman character without ornamentation.
| Aircraft Type | Nationality Mark | Format | Example |
|---|---|---|---|
| Civil | VT | VT – 3 Roman letters, no ornamentation | VT-EPC |
| Air Force | VU | VU – 3 Roman letters, no ornamentation | VU-AWB |
| Unmanned (India) | U | U + 6 alpha-numeric characters (0–9 or A–Z) | UB67DFC |
The nationality marks allotted to India by ITU are AT to AW (not VT or VU). The nationality marks actually used in India are VT, VU and U. Two different questions, two different answers — do not confuse them.
The exterior of an aircraft is legally regulated real estate. What may — and may not — be displayed on it is spelled out plainly.
An aircraft shall not bear on any part of its exterior surface any Advertisement or any sign or lettering except those under these rules and as required or permitted by the Director-General.
An aircraft other than a State aircraft shall not bear any mark or sign prescribed for use by a State aircraft. Civil aircraft may not "impersonate" military/state markings.
Modern airline fleets are largely leased. India's new leasing hub — IFSC/IFSCA at GIFT City — is a favourite recent examiner topic.
| Term | Definition |
|---|---|
| Lease | An agreement by a person (the lessor) to furnish an aircraft to another person (the lessee) to be used for compensation or hire purposes, for a specified period or a defined number of flights. |
| Lessor | The party furnishing the aircraft under a lease. |
| Lessee | The party using the aircraft under the provisions of a lease. |
| Leasing Company — GIFT City | Leasing companies/entities registered with IFSC and approved by IFSCA for undertaking leasing of aircraft. |
The lessee operator of the aircraft must hold the necessary economic and operating authority for the aircraft and must exercise operational control over the aircraft. Accordingly, the lessee must provide:
All 15 questions from the chapter are reproduced below. The correct option is highlighted green and marked ✓, with a one-line rationale. A consolidated answer key grid follows.
1The registration mark shall be letters, numbers or a combination of letters and numbers, and shall be that assigned by:
Why: ITU allots the underlying symbols, but the individual registration mark itself is assigned by the State of Registry (or the common-mark registering authority for joint operations).
2The common mark shall be selected from the series of symbols included in the radio call signs allocated:
Why: The common-mark series (4YA–4YZ) is allocated by the ITU to ICAO for use by common-mark registering authorities.
3The assignment of the common mark to a common mark registration authority will be made by:
Why: ICAO takes the pool of symbols provided by ITU and assigns a common mark to each common-mark registering authority.
4When letters are used for the registration mark, combinations shall not be used which might be confused with urgent or distress signals, for example:
Why: XXX is a radio-telegraphy urgency signal — expressly listed alongside PAN and TTT as an example to avoid.
5When letters are used for the registration mark, combinations shall not be used which might be confused with:
Why: Annex 7 specifies avoiding five-letter combinations from Part II of the International Code of Signals (and three-letter combinations beginning with Q — the Q Code).
6The height of the marks on the fuselage (or equivalent structure) and on the vertical tail surfaces of heavier-than-air aircraft shall be:
Why: Fuselage / vertical tail marks — minimum 30 cm.
7The height of the marks on lighter-than-air aircraft other than unmanned free balloons shall be at least:
Why: Lighter-than-air (airships, manned balloons) — minimum 50 cm. Unmanned free balloons are the exception (set by the State of Registry).
8When letters are used for registration mark, combinations shall not be used which might be confused with urgent signals, for example:
Why: PAN is the radio-telephony urgency signal — expressly listed in the rule.
9When letters are used for registration mark, combinations shall not be used which might be confused with urgent signals, for example:
Why: TTT is the radio-telegraphy safety signal — listed alongside XXX and PAN.
10The height of the marks under the wings of heavier-than-air aircraft shall be at least:
Why: Wing marks — minimum 50 cm on heavier-than-air aircraft.
11A certificate of registration is valid from the date of registration to:
Why: The certificate has no fixed expiry — it remains valid until DGCA cancels it (destruction is only one of seven cancellation grounds).
12Nationality marks allotted to India by ITU are:
Why: ITU allotted AT–AW to India, though India continues to use pre-Independence VT and VU in practice.
13Nationality marks used in India are:
Why: VT for civil, VU for Air Force, and U + 6 alpha-numeric characters for unmanned aircraft.
14Who exercises operational control over the leased aircraft?
Why: The lessee must hold the economic and operating authority and provide the crew, dispatchers and ground facilities — operational control sits with the lessee.
15A company undertaking to lease aircraft in India must be approved by:
Why: Aircraft-leasing companies at IFSC (GIFT City) are approved by the IFSCA.
| Q | A | Q | A | Q | A | Q | A | Q | A |
|---|---|---|---|---|---|---|---|---|---|
| 1 | B | 4 | A | 7 | B | 10 | A | 13 | A |
| 2 | B | 5 | C | 8 | B | 11 | C | 14 | B |
| 3 | A | 6 | C | 9 | B | 12 | C | 15 | B |