INSTRUMENT RATING 26 / LEARN · EXPLORE · CHECK
Arrival procedures
Interpret STAR routing, altitude and speed authority, plan a workable descent, and prepare the transition to the approach.
Your learning goals
- Interpret a STAR route, transition, and restrictions.
- Distinguish published constraints from the authority given by the clearance.
- Plan descent and communicate inability before a restriction cannot be met.
Read the entire arrival, including its transition
A standard terminal arrival (STAR) is a published IFR route that connects the en route structure with the terminal/approach environment. It reduces lengthy route transmissions, but the name alone does not describe every required action. Read the complete chart and its text: procedure name/version, en route transition, common route, runway transition or landing direction, fixes, courses, distances, altitude/speed constraints and any vector segment.
The applicable transition matters. Two transitions may share a procedure name but lead through different fixes or to different runways. Verify the cleared route against the chart and the avionics sequence before joining. The end of a STAR is not necessarily the beginning of the expected approach; identify the connecting clearance or vector rather than inventing a link.
Have the current approved chart. For an RNAV STAR, the procedure must be retrievable by name from the aircraft database and conform to the published procedure. Review the PBN/equipment boxes, actual aircraft approval and required sensor availability. A string of manually entered waypoint names does not establish authorization to fly a named RNAV STAR. A working GPS map does not by itself establish the required navigation specification.
A STAR suitable for faster aircraft may contain heights, speeds or routing unsuitable for the training airplane. Accept or refuse according to actual capability. Request conventional routing, vectors or another arrival when appropriate; “NO STAR” in flight-plan remarks can communicate that preference, but discuss an unexpected assignment with ATC. No particular STAR or avionics function is assumed available in every single-engine airplane.
AIM 5-4-1(a)–(e): STAR route, charts, database and PBN requirements · IPH Chapter 3: Arrival Procedures; arrival transitions and charts · Current FAA Terminal Procedures Publication: actual STAR chart and notes
Separate mandatory constraints from planning notes
Read each altitude as at, at or above, at or below, or a window. A 6,000–7,000-foot window means cross within that interval; it does not mean select either altitude without regard to the rest of the path. Check whether a speed is an exact crossing instruction, a maximum, or a planning note. The actual chart wording and the issued clearance control.
Published STAR speed restrictions apply when cleared along that procedure, independently of a descend-via clearance, unless ATC modifies them. Begin slowing early enough to cross the specified waypoint correctly. Do not accelerate beyond that published speed after the waypoint unless ATC or a published note permits it; continue to meet later restrictions and §91.117 limits. Tell ATC when an assigned speed is unsuitable for the aircraft.
An EXPECT altitude or speed is planning information until ATC actually issues it. It does not authorize a descent or become a mandatory crossing condition merely because it is printed near a fix. A charted EXPECT altitude also is not an ATC-expected altitude for lost-communications purposes unless ATC specifically advised that expectation as part of a further clearance.
MEAs remain relevant terrain/navigation limits. They are not STAR crossing restrictions in the descend-via terminology, but remain above them unless ATC instructs descent below the MEA. Read the applicable cleared segment and any assigned protection instead of assuming every number on the page has the same function.
AIM 5-4-1(a)(1)–(2), including notes: published speeds, EXPECT values and MEAs · §91.117: aircraft speed limits and minimum-safe-speed provision · §91.185(c)(2): ATC-expected altitude in lost communications
Recheck constraints after a vector, direct clearance or transition change
When vectored or cleared to deviate off a STAR, consider the STAR canceled, including its published altitude/speed restrictions. Follow the new assigned heading/route, altitude and any issued speed. If ATC intends a return, it will advise where to expect resumption. An expectation to resume does not itself authorize rejoining and descending; understand the actual return clearance.
“Proceed direct MAPLE, descend via Pine Two” has a different meaning: with an altitude published at MAPLE, descend at pilot's discretion to meet that altitude, the applicable speed at MAPLE, and then the remaining arrival constraints. If the joining waypoint has no published altitude, ATC assigns an altitude for crossing it. If a direct clearance leaves uncertainty about the vertical authority or which constraints remain, ask before descending or deleting them.
A shortened route can remove the distance needed to descend and slow. Recalculate from the aircraft's present position, not from the original transition mileage. A runway change can alter both the lateral sequence and remaining restrictions. Check the amended chart path and avionics sequence, especially for a discontinuity, unexpected turn or retained altitude.
On first contact with a new frequency while descending via, report the altitude leaving, the arrival name, assigned runway transition/landing direction and any assigned restriction not published. For the fictional amended arrival: “Approach, N742FD leaving 7,000, descending via Pine Two, runway two-seven transition, except after LAKE maintain 5,000.” The full call sign and exception help the next controller verify the actual clearance.
AIM 5-4-1(a)(2): off-STAR vectors, direct-entry Example 5 and new-frequency reports · AIM 5-3-1(b): frequency transfer and altitude reports · AIM 4-4-7: record and read back critical revised instructions
Compute distance, then preserve a workable descent
Start with the required height loss, a descent rate appropriate to the actual airplane and phase, and forecast groundspeed. Time in minutes = height loss in feet ÷ descent rate in feet per minute. Distance in NM = groundspeed in knots × time in minutes ÷ 60. These relationships estimate a flightpath; they do not establish approved power, cooling, speed or descent-rate procedures.
Study inputs: lose 4,000 feet at a constant 500 feet per minute. That takes 8 minutes. At 120 knots groundspeed it uses 16 NM; at 150 knots groundspeed it uses 20 NM. The tailwind consumes more ground distance for the same vertical descent. Add room for slowing, level segments, turns and preparation. Compare the needed path against every intervening at-or-above, window and speed restriction, rather than only the final altitude.
If only 8 NM remains at 120 knots groundspeed, available time is 4 minutes and losing 4,000 feet would require an average 1,000 feet per minute. That arithmetic is a diagnosis of the late plan, not an instruction to dive or exceed a limitation. Determine actual capability and workload; request earlier descent, a different crossing restriction, more distance or vectors while the problem is still manageable. An arrival optimized for another airplane's performance may require refusal or amendment.
Use the AFM/POH and approved supplements for airspeed, configuration, power and equipment limits. Ice, turbulence, engine operation and an unstable descent can remove the assumptions behind a simple calculation. If an unexpected short route or late descent cannot be safely flown, clearly state unable and obtain an amendment. Protect aircraft control while the clearance is being resolved.
IPH Chapter 3: Arrival Procedures, Descent Planning · AIM 5-4-1: accept/refuse STAR and comply with actual constraints · AIM 4-4-1/4: clearance acceptance and amendment responsibility · ACS III.A.R3: aircraft capability and operating limitations
Prepare the next phase before the workload peaks
Obtain current destination weather, wind and altimeter information; check NOTAMs for runway, approach, navigation aid and equipment availability. Review the expected approach, transition/IAF, missed approach and the needed communication/navigation facilities. Compare current conditions and fuel with the plan for a usable alternate or diversion. An “expect” approach gives planning information and may change; it is not a commitment or clearance.
At an uncontrolled airport with broadcast ASOS/AWOS, obtain that current weather when able and tell ATC that you have it and state your intentions. A remotely distributed observation may be older than the local broadcast. ATC provides services and information within its role; the pilot determines whether the weather/visibility, aircraft capability and procedure are adequate for the operation.
Brief the runway transition, arrival constraints and likely connection to the approach, along with the actual checklist and source-selection procedures. Identify a suitable conventional aid when required, the approved RNAV capability when applicable, and the next frequency. Verify active navigation source, flight-director/autopilot modes and selected altitude according to the actual installation. A drawn magenta route does not prove that the correct vertical mode or altitude stop is active.
During late rerouting, keep control and the active clearance in view. Use a simpler level-flight segment, delayed programming or an ATC request for time if needed. Complete major setup while workload permits, then monitor the resulting flightpath. A tablet or automation system can support the briefing; neither assumes the pilot's communication or chart-compliance responsibility.
AIM 5-4-3/4: approach-control role and advance approach/current weather information · AIM 5-1-3: preflight current information and NOTAM review · §91.103: available information relevant to the flight · ACS V.B.S1/S3/S4/S6: facilities, current publications, communications and chart compliance
Rehearse the clearance and chart on the ground
With an instructor, use a current actual arrival or a clearly labeled teaching route. Trace the cleared transition and verbalize each altitude/speed constraint, the last assigned altitude and the specific descent authorization. Calculate an initial descent plan and explain what would make it unusable. Practice a route-only clearance, a descend-via clearance, an exception and an off-STAR vector.
Select the communication/navigation facilities needed for the route and next phase; identify an aid when necessary and explain the approved installation checks. Locate chart effective dates, relevant NOTAMs and all procedure pages. Practice the initial approach-control/descending-via report and a concise unable request. Compare the chart to the programmed sequence and monitor simulated selected altitude/mode changes.
Explain which instruction applies at each fix and where an amended clearance requires a new plan. A useful ground answer describes a timely action and its reason, not just a mnemonic. This prepares the ACS facility, publication, communication and chart-compliance skills; completing this reading does not demonstrate flying those skills solely by instruments.
ACS V.B.S1/S3/S4/S6: instructor-led flight skills prepared by this ground rehearsal · AIM 5-4-1: actual STAR route, altitude and speed responsibilities
FLIGHT SCENARIO
What would change your plan?
A fictional Pine Two STAR includes MAPLE at or above 8,000 and LAKE at 5,000. N742FD is assigned 10,000 and receives only “cleared Pine Two arrival.” The chart shows EXPECT 6,000 near another fix. Later, ATC clears descend via, then vectors the aircraft off the STAR at 8,000 and assigns maintain 8,000. A tailwind shortens the time available for the next descent. Explain the changing authority, needed reports and next planning steps.
- NoticeWhat does this situation require?
- VerifyWhat evidence is still missing?
- DecideWhat keeps an option open?
Compare your reasoning
Initially retain 10,000; route-only STAR clearance does not authorize descent, and EXPECT 6,000 remains planning information. Descend via supplies descent authority while requiring the applicable published/issued constraints. On the off-STAR vector the STAR and its constraints are canceled; follow the new vector and assigned 8,000 until further instructions. Verify any subsequent rejoin/vertical clearance and report the actual assignment on the next frequency. Recalculate descent distance using the changed groundspeed and route, prepare current weather/approach information, and request an amendment before an unsafe or impossible restriction develops.
SUMMARY
The arrival chart supplies a route and constraints; the actual clearance determines when and how descent is authorized.
Initially retain 10,000; route-only STAR clearance does not authorize descent, and EXPECT 6,000 remains planning information. Descend via supplies descent authority while requiring the applicable published/issued constraints. On the off-STAR vector the STAR and its constraints are canceled; follow the new vector and assigned 8,000 until further instructions. Verify any subsequent rejoin/vertical clearance and report the actual assignment on the next frequency. Recalculate descent distance using the changed groundspeed and route, prepare current weather/approach information, and request an amendment before an unsafe or impossible restriction develops.
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
12 flashcards, then 10 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
- Current AIM 5-4-1/3/4STAR constraints and descend-via examples, approach-control roles and advance approach/weather information.
- Current AIM 4-4-1/4/7/10Clearance acceptance, amendment, readback and altitude-assignment meaning.
- Current AIM 5-3-1Frequency-transfer and initial altitude report practices.
- Current AIM 5-1-3Current preflight publications and NOTAM information.
- 14 CFR §91.123Actual clearance compliance and clarification.
- 14 CFR §91.117Applicable aircraft speed limits.
- 14 CFR §91.185(c)(2)ATC-expected altitude distinction.
- 14 CFR §91.103Available information relevant to the flight.
- Instrument Procedures Handbook, Chapter 3: Arrival ProceduresArrival chart/transition interpretation and Descent Planning; current AIM governs current procedural phraseology.
- FAA current Terminal Procedures PublicationsUse the actual complete current STAR and approach charts.
- Instrument Rating–Airplane ACS FAA-S-ACS-8C III.A/V.BExact arrival knowledge/risk associations and ground preparation for facility/chart/communication skills.
For U.S. single-engine airplane instrument study. Official sources checked October 8, 2026; eCFR displayed Title 14 current through October 6, 2026. Use current publications and the applicable aircraft AFM/POH and avionics supplements. These lessons support ground study and do not replace required instruction, endorsements, experience, or tests.
ACS study associations
These associations identify the concepts taught here. Skill elements describe preparation for instructor-led flight training; reading or completing this lesson does not demonstrate flight proficiency.
- IR.V.B.K1 — Teaches STAR routing, transitions, constraints and descent planning; departure/en route elements are taught in lessons 24–25.
- IR.V.B.K2 — Distinguishes arrival/approach authority, ATC services and pilot communication/capability duties.
- IR.V.B.R1 — Addresses misunderstanding and loss of compliance after published or amended arrival instructions.
- IR.III.A.R1 — Mitigates clearance misunderstanding through explicit authority, exceptions and verification.
- IR.III.A.R3 — Compares STAR/descent instructions with aircraft approval, operating limits and practical capability.
- IR.V.B.S1 — Ground preparation for selecting/identifying applicable arrival communication and navigation facilities.
- IR.V.B.S3 — Ground preparation for using current complete arrival charts, NOTAMs and related publications.
- IR.V.B.S4 — Rehearses agency contact, descending-via phraseology and timely clarification/compliance decisions.
- IR.V.B.S6 — Ground chart/clearance interpretation prepares applicable procedure compliance without claiming flight proficiency.