Why Airport Operations Matter for Drone Pilots
As a remote pilot, you will frequently operate near airports — and near the traffic patterns, approach paths, and departure corridors used by manned aircraft. Part 107 requires you to be familiar with airport operations so you can:
- Identify airports and their characteristics from sectional chart excerpts on the exam
- Anticipate where manned aircraft are likely to be when flying near an airport
- Know when you need airspace authorization (LAANC) before operating
- Recognize airport signs, markings, and lighting — all tested on the UAG exam
- Understand ATIS and CTAF broadcasts for situational awareness
Runway Numbering
Every runway has a number painted at its threshold. The number equals the runway's magnetic heading divided by 10, rounded to the nearest whole number. Runway 27 = 270° magnetic (due west). Runway 09 = 090° magnetic (due east). Runway 27 and Runway 09 are opposite ends of the same strip of pavement.
| Runway Number | Magnetic Heading | Direction (approximate) |
|---|---|---|
| Runway 18 | 180° | South |
| Runway 27 | 270° | West |
| Runway 36 | 360° (or 000°) | North |
| Runway 09 | 090° | East |
| Runway 14 | 140° | Southeast |
Parallel runways are designated L (left), C (center), or R (right) from the pilot's perspective on approach: e.g., Runway 28L and 28R.
Runway and Taxiway Markings
Color is the first clue. All runway markings are white. All taxiway markings are yellow. This distinction is consistently tested.
| Marking | Color | What it marks |
|---|---|---|
| Runway centerline | White dashed | Center of the runway surface |
| Runway threshold | White transverse stripes | Beginning of landing area at runway end |
| Touchdown zone markings | White rectangular pairs | 1,000 ft zone from runway threshold for landing aircraft |
| Runway designation | White numbers/letters | Runway number painted at the threshold |
| Hold short line | Four yellow lines (2 solid, 2 dashed) | Runway entry — solid side faces runway, do not cross without clearance |
| Taxiway centerline | Yellow solid line | Guidance path on taxiway surface |
| Edge line (taxiway) | Double yellow lines | Edge of taxiway surface |
| ILS critical area | Yellow ladder markings | Defines ILS signal protection area — hold clear during approaches |
Airport Signs
Airport surface signs come in several types, each with a distinct color scheme. The exam may show sign colors and ask you to identify their meaning.
| Sign Color | Type | Examples |
|---|---|---|
| Red background, white text | Mandatory instruction | Runway designations (27-9), hold short (HOLD SHORT RWY 27), ILS critical area |
| Black background, yellow text | Location | Taxiway letter (C), runway you're on (RWY 27) |
| Yellow background, black text + arrow | Direction | Taxiway direction arrows (▶ A, ▶ C) |
| Yellow background, black text (no arrow) | Destination/Information | FBO →, CARGO →, runway distance remaining |
Traffic Patterns
A traffic pattern is the standardized rectangular flight path flown by manned aircraft during takeoff and landing. All drone pilots must understand traffic patterns because operations near airports may conflict with this flow of traffic.
Standard traffic pattern altitude: 1,000 ft AGL for piston aircraft (may be 1,500 ft AGL at some locations — check the Chart Supplement). The pattern is on the left side of the runway unless the runway is marked "right traffic" on sectional charts or Chart Supplement.
Airport Communications: CTAF, UNICOM, ATIS, AWOS
Understanding the radio communication environment around airports is an exam topic — and important for real-world situational awareness when flying near airports.
| System | What it is | Who uses it | Available at |
|---|---|---|---|
| CTAF (Common Traffic Advisory Frequency) |
A designated frequency for traffic advisories at non-towered airports. Pilots announce their position and intentions. | All pilots near non-towered airports; drone pilots can monitor for situational awareness | Non-towered airports — shown on sectional chart and Chart Supplement as a circle-C symbol with the frequency |
| UNICOM | A private radio service at many airports for non-ATC communication: fuel, hangar info, airport advisories. Often shares the CTAF frequency at non-towered airports. | Pilots; FBO staff | Many non-towered airports (and some towered) |
| ATIS (Automatic Terminal Info Service) |
Pre-recorded audio broadcast with current weather, NOTAM, and operational info. Updated hourly. Identified by a letter (Information Alpha, Bravo, etc.). | Pilots arriving and departing at towered airports | Towered airports — ATIS frequency listed on sectional charts |
| AWOS / ASOS (Automated Weather Stations) |
Automated real-time weather broadcasts: wind, visibility, sky conditions, temperature, altimeter. ASOS is more capable than AWOS. | All pilots; drone pilots can call or listen for conditions before flight | Smaller airports without ATIS; frequencies listed in Chart Supplement |
| Ground Control | ATC frequency for surface movement at towered airports. Used by aircraft taxiing on the ground. | Pilots taxiing at towered airports | Towered airports |
| Tower | ATC frequency for active runway operations — takeoffs, landings, and traffic sequencing. | Pilots in the traffic pattern or landing/departing at towered airports | Towered airports |
Airport Rotating Beacons
Rotating beacons help pilots locate airports at night and in poor visibility. The flash pattern and color combination identify the airport type. Day operation of a beacon signals that instrument meteorological conditions (IMC) exist — ceiling below 1,000 ft AGL or visibility below 3 SM.
| Flash Pattern | Airport Type | Colors |
|---|---|---|
| White + Green | Civilian land airport | Alternating white and green |
| White + White + Green | Military airport | Two white flashes, then green |
| White + Yellow | Water airport / seaplane base | Alternating white and yellow |
| Green + Yellow + White | Heliport | Green, yellow, white sequence |
| White only (split-white) | Unlighted land airport (used in some situations) | Two white flashes |
Airport Runway Lighting
Runway and approach lighting help pilots align with the runway at night and in reduced visibility. The exam may ask you to identify lighting types and their colors.
| Light System | Color | Purpose |
|---|---|---|
| Runway Edge Lights | White (amber for last 2,000 ft) | Outline the runway edges; amber section indicates the remaining threshold caution zone |
| Runway Threshold Lights | Green (inbound) / Red (outbound) | Mark the beginning of the landing surface (green from the air); red when viewed from inside the runway looking out |
| Runway Centerline Lights | White, then alternating red/white, then red | Centerline guidance; color sequence warns of runway end approach |
| Touchdown Zone Lights | White transverse bars | Identify the touchdown zone for the first 3,000 ft of runway |
| Taxiway Edge Lights | Blue | Outline taxiway edges at night — blue = taxiway |
| Taxiway Centerline Lights | Green | Guide along taxiway centerline — green = go (follow the centerline) |
| VASI / PAPI | Red and White | Visual approach slope indicators — show pilots if they are on, above, or below the correct glide path |
Controlled vs. Non-Towered Airports
| Feature | Towered Airport (Class B/C/D) | Non-Towered Airport |
|---|---|---|
| ATC tower | Operating (Class B, C, or D airspace) | No tower (or tower not in operation) |
| Communication required | Yes — establish two-way radio before entering | No — but monitor CTAF for traffic awareness |
| Drone authorization | Required — LAANC or FAA DroneZone | May not be required (if Class G or Class E above 700 ft AGL) |
| Traffic sequencing | Handled by ATC — tower controls pattern | Self-announced on CTAF; standard traffic pattern |
| Chart symbol (sectional) | Blue (hard-surfaced runways, services available) | Magenta (may have less services or irregular operations) |
On sectional charts, towered airports are shown with blue symbols. Non-towered airports with hard-surface runways are shown with magenta symbols. Private or restricted-use airports may appear as a circle with an R. Emergency-use only airports are shown as a circle with an X overlay.
Reading ATIS Broadcasts
ATIS is the first thing instrument pilots listen to when approaching a towered airport. While drone pilots rarely call ATC directly, ATIS is a valuable source of real-time, official weather data.
A sample ATIS broadcast:
CHICAGO O'HARE INFORMATION BRAVO, 1556 ZULU. WIND 270 AT 12. VISIBILITY 6. FEW CLOUDS 3,500. TEMPERATURE 22. DEWPOINT 17. ALTIMETER 29.85. ILS RUNWAY 28L IN USE, DEPARTING RUNWAYS 22L AND 22R. NOTICE TO AIRMEN: RUNWAY 10R-28L TAXIWAY ALPHA CLOSED. ADVISE ON INITIAL CONTACT YOU HAVE INFORMATION BRAVO.
| Component | Meaning |
|---|---|
| INFORMATION BRAVO | This is the second update since midnight (Alpha = first, Bravo = second, etc.) |
| 1556 ZULU | Observation time in UTC (Zulu time) — 1556Z = 10:56 AM CDT (UTC-5 in summer) |
| WIND 270 AT 12 | Wind from 270° (west) at 12 knots |
| VISIBILITY 6 | 6 statute miles — above the 3 SM Part 107 minimum |
| FEW CLOUDS 3,500 | FEW cloud layer at 3,500 ft AGL — above the 500 ft below-cloud minimum |
| ALTIMETER 29.85 | Barometric pressure setting for altimeters |
For METAR and TAF decoding (the written form of weather data used in exam questions), see the full Weather & METAR Guide.
Exam-Style Scenarios
You see a row of four yellow lines — two solid and two dashed — painted across a taxiway. What does this marking mean, and which direction can you proceed without ATC clearance?
Analysis: This is a runway hold short line. The solid lines face the runway side. You may proceed freely on the dashed (taxiway) side. You may not cross the solid lines onto the runway without ATC clearance at a towered airport. At a non-towered airport, you self-announce on CTAF and visually confirm no traffic before entering the runway.
While surveying a potential flight site at 2 PM on a clear day, you notice the airport beacon nearby is actively rotating. What does this tell you?
Analysis: A rotating beacon during daylight hours signals that the weather at the airport is below VFR minimums — ceiling below 1,000 ft AGL or visibility below 3 SM. Even though the sky looks clear from your location, conditions may be IMC near the airport. This is a trigger to verify weather data from an official source (ATIS, AWOS, or METAR) before conducting operations.
You are flying a drone at 350 ft AGL approximately 0.5 NM northeast of a non-towered airport with Runway 27 in use (standard left-hand pattern). Where is the traffic pattern relative to your position?
Analysis: Runway 27 runs east-west (heading 270°, so aircraft land heading west). With a standard left-turn pattern, the downwind leg runs east at ~1,000 ft AGL to the south of the runway. The base leg would be on the east end of the runway, turning south-to-north. If you are northeast of the airport, you could be near the crosswind or downwind leg extended — manned aircraft could be nearby at ~1,000 ft AGL. Your 350 ft AGL keeps you below them, but you should remain aware.
Airport Operations FAQ
What does a runway number tell you?
It tells you the magnetic heading of the runway, divided by 10. Runway 27 = 270° magnetic heading (due west). The far end is always ±18 from the near end — so the other end of Runway 27 is Runway 09 (090°, due east). Parallel runways get L, R, or C suffixes.
Why are runway markings white and taxiway markings yellow?
White and yellow are the FAA-standardized colors for runway and taxiway surfaces. The distinction is critical for preventing runway incursions — accidentally crossing from a taxiway onto an active runway. On the exam, color is usually sufficient to identify what type of surface or marking you're dealing with.
What is a standard traffic pattern altitude?
1,000 ft AGL for most piston-powered aircraft. Some airports use 1,500 ft AGL. The pattern altitude is listed in the FAA Chart Supplement and may appear in exam questions. Since Part 107 limits drones to 400 ft AGL, you will always be well below traffic pattern altitude — but knowing where the pattern extends laterally is still important.
What does it mean when an airport beacon is on during the day?
Day operation of an airport beacon indicates that weather at that airport is below VFR minimums: ceiling below 1,000 ft AGL or visibility below 3 statute miles (IMC conditions). This is a signal to verify current conditions with official weather sources before flying nearby.
Do I need to contact ATC to fly a drone near an airport?
You do not need to make radio contact, but you must have airspace authorization (via LAANC or FAA DroneZone) to fly in Class B, C, D, or E surface airspace — which exists around most airports. In Class G airspace, no authorization is required, but all other Part 107 rules still apply. Monitoring CTAF at non-towered airports is strongly recommended for situational awareness.
What does a magenta airport symbol mean on a sectional chart?
A magenta airport symbol indicates a non-towered airport with a hard-surface runway, or a non-towered airport with other services. Blue airport symbols indicate towered airports (Class B, C, or D). A circle with a tick marks at non-standard angles may indicate a military airport or private field — check the Chart Supplement for details.
What is a "right traffic" pattern?
Standard traffic patterns use left turns. A right traffic pattern means all turns in the pattern are right turns — used when terrain, obstacles, noise abatement, or other factors make left patterns impractical. Right traffic is indicated on sectional charts by "RP" next to the airport data block, and in the Chart Supplement. Knowing which side the pattern is on helps you anticipate where manned aircraft will be relative to your operation.
What are the five legs of the traffic pattern?
Upwind (departure), crosswind, downwind, base, and final. Manned aircraft follow this path in sequence for every landing. The downwind leg — parallel to the runway at ~1,000 ft AGL — is typically the most congested portion, as aircraft are in a line waiting to turn base and final.
More Part 107 Study Resources
Disclaimer: Launch107 is an independent study resource, not affiliated with or endorsed by the FAA. Airport procedures, airspace classes, and ATC requirements change. Always verify current airport information, NOTAMs, and airspace requirements at FAA.gov/uas and through official pre-flight planning tools before every flight.