Airport Lights/Markings Flashcards
2 Bar VASI

3 Bar VASI

PAPI
- Visible from 5 miles during the day and up to 20 miles at night
- Obstruction clearance within plus or minus 10 degrees of the extended runway centerline

Tri-Color Visual Approach Slope Indicator
- Typically one single light on left side of RWY

REILS
- Provide rapid and positive identification of the approach end of a particular runway
- Pair of synchronized flashing lights located laterally on each side of the runway threshold
- May be omni or unidirectional

RWY Edge Light Systems
- HIRLS (High),MIRLS (Medium), or LIRLS (Low) Intensity
- White
- On instrument runways yellow replaces white on the last 2,000 feet or half the runway length, whichever is less.

Runway Centerline Lighting System (RCLS)
- Precision approach RWYs
- 50’ intervals
- White until the last 3000’
- Alternate red and white for next 2000’
- Red for final 1000’

Touchdown Zone Lights (TDZL)
- Precision approach RWY
- 2 rows of light bars placed symmetrically about RWY centerline
- Steady burning white lights
- Start 100’ beyond threshold
- Extend to 3,000 feet beyond the landing threshold or to the midpoint of the runway, whichever is less

Taxiway Centerline Lead-Off Lights
- Visual guidance to persons exiting the runway
- Alternate green and yellow

Taxiway Centerline Lead-On Lights
- Visual guidance to persons entering the runway
- Alternate green and yellow

Land and Hold Short Lights
- Indicate hold short point on RWY with LAHSO
- A row of pulsing white lights installed across the runway at the hold short point
- On when LAHSO active
- Off when LAHSO inactive

Airport Marking Colors
- RWY - White
- TWY - Yellow
- Areas not intended for use by aircraft - Yellow
- Hold Position Markings - Yellow
Types of Signs at Aiports
- Mandatory instruction signs
- Location signs
- Direction signs
- Destination signs
- Information signs
- Runway distance remaining signs
Mandatory Instruction Signs
- White letters on white background
- Show entrance to RWY
- Show areas where AC are prohibited

Location Signs
- Black with yellow writing
- Identify either a taxiway or runway on which the aircraft is located

Runway Boundary Sign
- Yellow background with black inscription
- Visual cue to show when AC is “clear of the runway.”

ILS Critical Area Boundary Sign
- Yellow background with a black inscription with a graphic depicting the ILS pavement holding position marking
- Located adjacent to red/white mandatory sign
- Must not cross without ATC clearance

Direction Signs
- Yellow background with a black inscription

Destination Signs
- Yellow background with black writing
- Have an arrow showing the direction of the taxiing route to that destination

Information Signs
- Yellow background with black writing
- Information on:
- Areas that cannot be seen from the control tower
- Applicable radio frequencies
- Noise abatement procedures, etc.
Runway Distance Remaining Signs
- Black background with white numeral
- Indicates the distance (in thousands of feet) of landing runway remaining

Types of TWY Lights
- TWY Edge Lights
- TWY Centerline Lights
- Clearance Bar Lights
- RWY Guard Lights
- Stop Bar Lights
TWY Centerline Lights
- Steady burning green light

Clearance Bar Lights
- Installed at holding positions on taxiways
- Show location of an intersecting taxiway
- 3 in-pavement steady-burning yellow lights.

RWY Guard Lights
- Installed at taxiway/runway intersections
- Pair of elevated flashing yellow lights on either side of TWY
Or,
- A row of in-pavement yellow lights across TWY at the runway holding position marking

Stop Bar Lights
- Confirm the ATC clearance to enter or cross the active RWY
- A row of red, unidirectional, steady in-pavement lights across TWY at RWY holding position, and elevated steady-burning red lights on each side

Enhanced Centerline
- Parallel line of yellow dashes on either side of the normal TWY centerline
- Enhanced for a maximum of 150’ prior to a runway holding position marking
- Warn pilot of approaching a RWY hold position marking
Code Beacons
- ID airports and landmarks
- Flashes the 3-4 character airport ID in Morse Code 6-8 times per minute
- Land airports flash green
- Water airports flash yellow
Aviation Red Obstruction Lights
- Flashing red beacons (20-40 flashes per minute) and steady red lights during night ops
- Orange and white paint is used for daytime marking
Medium Intensity Flashing White Obstruction Lights
- Daytime/Twilight
- Reduced intensity for night ops
- Not normally installed on structures less than 200’ AGL
- When used on structures 500’ AGL or less, other methods of marking and lighting may be omitted
- Orange and white paint required on structures 500’ AGL or more for daytime ops
High Intensity White Obstruction Light
- Flashing high intensity white lights during day with reduced intensity for twilight and night ops
- Marking of structures with red obstruction lights and orange and white paint may be omitted
Dual Lighting
- Flashing red beacons and steady red lights for night ops
- Flashing high intensity white lights for daytime ops
- Orange and white paint may be omitted
Catenary Lights
- Lighted markers for increased night conspicuity of high-voltage transmission line
- Lighted markers provide conspicuity both day and night.