VFR REGULATIONS 05 / LEARN · EXPLORE · CHECK
Minimum safe altitudes
Protect the people below and leave a landing option.
Your learning goals
- Apply the rule that follows you everywhere.
- Recognize the limits and exceptions that affect this flight.
- Explain a decision using the scenario and supporting rule.
The rule that follows you everywhere
Except when necessary for takeoff or landing, fly high enough that a power failure allows an emergency landing without undue hazard to people or property on the surface. Meeting a numerical clearance does not cancel this obligation. These are airplane rules; other aircraft categories have specific exceptions.
Congested versus open terrain
Congested areas or an open-air assembly: at least 1,000 feet above the highest obstacle within a 2,000-foot horizontal radius of the aircraft. Other than congested: at least 500 feet above the surface. Open water or sparsely populated areas: the 500-foot surface minimum is excepted, but remain at least 500 feet from any person, vessel, vehicle, or structure—in any direction.
Choose margin, not the lowest number
“Sparsely populated” does not mean “I see one empty field.” Consider the actual setting, obstacles, emergency landing options, and other restrictions. Takeoff/landing necessity is not a blanket excuse for low sightseeing.
EXPLORE / APPLY THE RULE
Measure from the right reference
Over a congested area, search 2,000 ft horizontally in every direction from the aircraft. The line shown is one radius, from center to edge.
The congested-area minimum is 1,000 ft above the highest obstacle within that circle.
The ordinary noncongested minimum is 500 ft above the surface.
Not to scale. Necessary takeoff/landing exception, open-water/sparse-area separation, and the anywhere emergency-landing rule are explained in Learn.
FLIGHT SCENARIO
What would change your plan?
Over a town, the highest obstacle within 2,000 feet horizontally tops out at 1,400 MSL. Is 2,200 MSL enough?
- NoticeWhat does this situation require?
- VerifyWhat evidence is still missing?
- DecideWhat keeps an option open?
Compare your reasoning
No. The congested-area number calls for at least 2,400 MSL, and you must still satisfy the engine-failure landing requirement and other rules.
SUMMARY
Protect the people below and leave a landing option.
No. The congested-area number calls for at least 2,400 MSL, and you must still satisfy the engine-failure landing requirement and other rules.
Before moving on, explain the decision in your own words: what would you verify, and what would make you change the plan?
PRACTICE
Flashcards and knowledge check
Six flashcards, then five questions with explanations.
Enable JavaScript for flashcards and the knowledge check. The lesson and scenario remain available without it.
Sources & lesson notes
Sources & lesson notes
- 14 CFR §91.119Verified against eCFR text current through September 15, 2026.
For U.S. private-pilot airplane study. Rules verified against eCFR text current through September 15, 2026, with linked FAA guidance. Scenarios isolate a rule; actual flight decisions require all applicable rules, aircraft limitations, and current information.