Airport chart walkthroughs / HWO
North Perry (HWO) on the sectional chart
FAA Miami sectional, Sep 3, 2026 edition. Study use only, not for navigation.
How to read the Class D airspace, part-time tower and CTAF at North Perry on the FAA Miami sectional: the kind of chart reading the Part 107 test asks for. Two practice questions with worked answers below.
What the chart and FAA data show
| Item | Value |
|---|---|
| Sectional chart | Miami, Sep 3, 2026 edition |
| Airspace at the field | Class D (dashed blue line), part-time tower |
| Class D vertical limits | From the surface up to and including 2,500 ft MSL |
| Field elevation (FAA NASR) | 8.5 ft MSL |
| Top of the Class D above the field | about 2,492 ft |
| Tower hours (FAA NASR) | 0700-2100 local |
| CTAF when the tower is closed | 132.1 |
How to read it
Find the dashed blue circle around HWO: that is Class D airspace. The boxed number inside it, [25], is the ceiling in hundreds of feet MSL, so this Class D goes up to 2,500 ft MSL. Subtract the field elevation (8.5 ft) to get the height above the airport: about 2,492 ft. Chart altitudes for airspace are MSL unless marked AGL.
In the airport data block, the star after the tower frequency (CT - 132.1) means the tower is part-time, and the magenta C means that frequency is also the CTAF when the tower is closed. When the tower closes, the airspace usually reverts to Class E or Class G; the Chart Supplement has the details.
For a drone: flying a small UA in Class D airspace needs ATC authorization first (LAANC or FAA DroneZone; 14 CFR 107.41).
Practice: 2 questions on this chart
Practice question 1 of 2
Refer to the marked airport. What are the vertical limits of the Class D airspace at NORTH PERRY (HWO)?
- A. From the surface up to and including 2,500 ft AGL
- B. From 2,500 ft MSL up to 10,000 ft MSL
- C. From the surface up to and including 2,500 ft MSL
Show the answer
Answer: C. From the surface up to and including 2,500 ft MSL
Inside the dashed blue Class D circle you'll find a number in a box: [25]. It gives the ceiling in hundreds of feet MSL, so this Class D goes from the surface to 2,500 ft MSL. Field elevation is 8 ft MSL, so the Class D extends about 2,492 ft above the airport. Chart altitudes for airspace are MSL unless marked AGL.
Question ID: c-6c504e1cd8 | ACS UA.II.A.K1c
Practice question 2 of 2
Refer to the marked airport. If the control tower at NORTH PERRY (HWO) is not in operation, which frequency should be used as the CTAF to monitor airport traffic?
- A. 132.1
- B. 135.475
- C. 122.95
Show the answer
Answer: A. 132.1
The airport data block shows the tower frequency after CT: CT - 132.1, followed by a star and a magenta C. The star means the tower is part-time (hours are listed in the Chart Supplement: 0700-2100 local). The magenta C next to it means the tower frequency becomes the CTAF when the tower is closed, so the answer is 132.1. The other choices are frequencies printed nearby for other services (ATIS, ground, UNICOM). When the tower closes, Class D airspace usually reverts to Class E or Class G; check the Chart Supplement.
Question ID: c-145b2e6bfe | ACS UA.V.A.K1, UA.V.A.K2, UA.V.B.K2
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