FAR Ninety-One Point One Thirteen, the Aircraft Right-of-Way Rules Most Students Recite Without Understanding, and the Category Hierarchy That Puts a Balloon at the Top of the Priority Stack
FAR 91.113 builds a maneuverability-based right-of-way hierarchy that applies in all airspace - here's how the full priority stack works and when each rule kicks in.
FAR 91.113 establishes a maneuverability-based right-of-way hierarchy for all aircraft operations - IFR and VFR, controlled and uncontrolled airspace alike. The priority stack runs from aircraft in distress at the top, through balloons, gliders, airships, and powered parachutes, down to airplanes and rotorcraft at the bottom. Understanding the reasoning behind the order - not just memorizing it - is what makes these rules usable when converging traffic demands a real decision.
What does “see and avoid” actually require?
The regulation opens with a universal obligation: every pilot shall maintain vigilance to see and avoid other aircraft. This applies whether operating under instrument flight rules (IFR) or visual flight rules (VFR), inside controlled airspace or outside it.
See and avoid is a continuous, active responsibility - not a backup to radar separation. ATC radar has real gaps: uncontrolled airports have no radar coverage, small aircraft can fall below the radar floor, and VFR traffic may not be in contact with any facility. See and avoid fills every one of those gaps.
An instrument rating does not change this requirement. Flying IFR in visual meteorological conditions (VMC) means your clearance separates you from other IFR traffic - but not from the VFR aircraft at your altitude. In those conditions, you remain part of the see-and-avoid system.
What is the full right-of-way hierarchy under FAR 91.113?
The priority stack runs from least maneuverable to most maneuverable:
- Aircraft in distress - right-of-way over all other traffic, no exceptions
- Balloons - right-of-way over all other aircraft categories
- Gliders - right-of-way over airships, airplanes, and rotorcraft
- Airships - right-of-way over airplanes and rotorcraft
- Powered parachutes and weight-shift control aircraft - right-of-way over airplanes and rotorcraft
- Airplanes and rotorcraft - lowest category priority
An aircraft declaring an emergency overrides every other consideration. If a Mayday is on frequency and traffic is converging toward you, you move.
A balloon ranks second - above jets, turboprops, and every other powered category - because it has no directional control in any practical sense. It goes where the wind goes. It cannot turn away from converging traffic, so every aircraft that can maneuver carries the responsibility to clear the way.
Why does a balloon outrank a glider in the priority stack?
Both are unpowered, but a glider still has meaningful directional control. A glider pilot can turn, adjust the glide path, and make course corrections. A balloon pilot can climb by heating and descend by venting, but cannot steer away from converging traffic. That difference in maneuverability is what the hierarchy is measuring.
The logic applies across the entire stack: when an aircraft has fewer options, the surrounding traffic absorbs more of the separation burden.
How does the converging rule work when aircraft are the same category?
When two aircraft of the same category converge at approximately the same altitude and it is not a head-on situation, the aircraft to the other’s left has the right-of-way. The aircraft on the right gives way.
The correct mental model: if traffic is to your left, you hold. If traffic is to your right, you yield.
Category beats direction. If a glider is converging from your right, you still yield - not because of the direction, but because the glider outranks you in the hierarchy. The directional rule only applies within the same category.
What do both pilots do in a head-on encounter?
When two aircraft are approaching head-on, or nearly so, both pilots shall alter course to the right. Not one pilot, not the one who spotted traffic first - both aircraft turn right, the paths diverge, and the geometry resolves.
This is the clearest rule in the regulation because there is no ambiguity about who acts. Two aircraft converging at a combined speed of 300 knots close one mile in 12 seconds. Scanning habits built before the encounter are the only thing that creates enough reaction time to apply the rule.
Who yields when overtaking another aircraft?
The overtaking aircraft gives way and passes to the right. The aircraft being overtaken has the right-of-way and is not required to change course.
FAR 91.113 defines overtaking as being within 30 degrees of the other aircraft’s line of flight from behind. If you are gaining on another aircraft and your angle puts you within that cone, you are the overtaking aircraft, and you pass to the right.
Speed does not confer right-of-way. The faster aircraft, with more energy and more options, is still the one that gives way. This applies in the traffic pattern as well: if you are catching a slower aircraft on final, you are overtaking. Extend your spacing or break off the approach - do not close the distance and wait for the aircraft ahead to clear.
Who has right-of-way when aircraft are approaching to land?
An aircraft on final approach or in the act of landing has the right-of-way over all aircraft in flight or on the surface.
When two aircraft are approaching to land on the same runway simultaneously, the lower aircraft has the right-of-way. But the regulation adds an immediate practical limit: the pilot of the lower aircraft shall not take advantage of this rule to cut in front of an aircraft already established on final approach.
That constraint matters. If another aircraft is already on a stabilized final, you cannot slip underneath and claim lower-aircraft priority. The rule protects established approaches - it is not a mechanism for aggressive pattern work.
How do these rules work together in a real traffic pattern scenario?
Consider this situation: you are flying a Piper Cherokee, entering the downwind for runway 27 at a non-towered airport on a clear afternoon. A glider is turning base. A Cessna 172 is on a one-mile final, stabilized.
- The Cessna on final has priority over both of you - it is on final approach.
- The glider on base has priority over you - gliders outrank powered airplanes in the category hierarchy.
- If the glider and Cessna both end up on final simultaneously, the lower aircraft holds priority, but neither should cut in front of an established approach.
Your job as the Cherokee: extend your downwind. Give the glider room on base, give the Cessna room on final. Announce your intentions on the common traffic advisory frequency (CTAF). Keep the scan going.
This kind of mixed-category pattern situation happens at uncontrolled airports every weekend. Glider strips share airspace with powered traffic constantly. The regulation gives every pilot in that environment a shared, predictable framework - when everyone applies the same rules, the geometry resolves safely without negotiating in the moment.
Does traffic alert technology change right-of-way responsibilities?
No. Traffic alert systems - whether a moving map with traffic targets or an audio alert device - help you see traffic sooner. Seeing traffic sooner gives you more time to apply the rules. The right-of-way hierarchy and the see-and-avoid requirement do not change based on panel equipment. Steam gauges or full glass cockpit, the rules are identical.
How will the ACS test right-of-way knowledge on the checkride?
The Airman Certification Standards (ACS) test scenario-based application, not just recall. An examiner may present a diagram of converging traffic or walk through a pattern situation and ask what you do, who yields, and why.
The harder questions ask what the lower-aircraft-on-final rule does not permit - separating students who read the regulation from students who understood it. Know the hierarchy and know the reasoning behind each position in the stack. When you understand why the balloon wins, the rest of the order follows naturally.
Key Takeaways
- See and avoid is a universal, continuous obligation - it applies IFR and VFR, inside and outside controlled airspace, regardless of what ATC services are active.
- The right-of-way hierarchy runs: aircraft in distress → balloons → gliders → airships → powered parachutes and weight-shift control aircraft → airplanes and rotorcraft. Less maneuverability equals higher priority.
- Category beats direction. The converging rule - yield to your right - only applies within the same aircraft category.
- Head-on situations: both aircraft turn right. No ambiguity, no negotiation - both act immediately.
- Overtaking: pass to the right and yield, regardless of speed or aircraft capability. This applies in the pattern, not just en route.
- An aircraft on final has right-of-way over all others; when two aircraft approach simultaneously, the lower one holds priority - but may not cut in front of an already-established approach.
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