Markings on Aircraft

Types of Aircraft Markings

Aircraft identification marks fall into three main categories:

• Nationality Mark: Indicates the country of registration (e.g., "G" for the UK).
• Registration Mark: Unique to each aircraft, assigned by the State of Registry or common mark registering authority. It typically follows the nationality mark (e.g., "G-MPLD").
• Common Mark: Used for aircraft registered under an international operating agency or for certain international operations.

Placement and Characteristics

• Wings: The full nationality and registration marks are displayed once on the lower surface of the left wing. The tops of the letters face the leading edge. Minimum height: 50 cm.
• Fuselage/Vertical Tail: Marks appear on each side of the fuselage (between the wings and tail) or on both sides of the vertical tail. Minimum height: 30 cm.
• Helicopters: Markings must be placed for best visibility, with flexibility due to limited surface area.

Assignment and Responsibility

• The State of Registry (or common mark registering authority) assigns both nationality and registration marks. The marks consist of letters, numbers, or a combination, but certain codes (e.g., "SOS", "Q" codes) are prohibited to avoid confusion with distress or communication signals.

Aerodrome and Object Markings

• Runway Markings: White paint for centre-line, threshold, touchdown zone, and side-stripes.
• Taxiway and Stand Markings: Yellow paint for centre-lines and aircraft stand positions.
• Holding Positions: Marked with specific patterns to indicate mandatory stops or intermediate holds.
• Object Marking: Fixed or mobile objects are marked with conspicuous colours (often red, white, or orange). If colouring isn't possible, markers (e.g., spheres on wires) are used to enhance visibility.

Maintenance

• All markings must be kept clean and legible. Damaged or faded markings must be restored promptly to ensure compliance and safety.