How do I read SID and STAR charts in a flight simulator?

To read SID and STAR charts in a flight simulator, confirm the airport, runway, procedure and transition, then trace the published fixes in flight order. Brief every altitude, speed and equipment restriction, check notes and minimum climb requirements, and compare the entire charted route with the FMS before departure or descent.

For Aviation & Real-World Flying, the clearance and applicable published procedure—not whatever the FMS happens to display—determine the intended route. A SID is a Standard Instrument Departure from the runway towards the en-route structure; a STAR is a Standard Terminal Arrival Route from the en-route structure into the terminal area.

What is the difference between a SID and a STAR?

A procedure may contain several runway branches and transitions. The correct STAR is not simply the one whose line looks closest to your route; use the arrival direction, expected runway, transition and clearance. We cover that decision separately in our method for matching a STAR to the route and landing runway.

How do you read a SID or STAR chart step by step?

1. Confirm the chart identity. Check the airport name and ICAO code, procedure title, revision or effective date, and procedure number. A departure or arrival with the same base name but a different number may contain changed fixes, constraints or routing.
2. Check applicability and equipment. Read the notes before tracing the route. Look for permitted runways, aircraft restrictions and requirements such as RNAV 1, RNP capability, GNSS or particular navigation sensors. Some simulator aircraft and simplified GPS units cannot reproduce every coded leg accurately.
3. Find the correct runway and transition. On a SID, begin at the departure runway and follow its branch towards the common route and departure transition. On a STAR, begin at the cleared arrival transition and work towards the terminal end. Do not mix branches from different runways because they happen to meet later.
4. Trace every fix in flight order. Read the fix names, tracks, courses and distances in sequence. Distinguish a heading from a course to a fix, and remember that a DME figure may be distance from a named station rather than the length of that leg. Most charts are not intended to be measured as scale maps.
5. Decode altitude restrictions. Identify each crossing as at, at or above, at or below, or within an altitude window. The graphical notation differs between chart formats, so use that chart's legend rather than memorising one publisher's symbols. Confirm whether values are altitudes or flight levels and do not confuse minimum safe-altitude information with a mandatory crossing restriction.
6. Mark speed limits. Published speeds are generally maximum values unless the chart says otherwise. Loading a restriction into the FMS does not guarantee that VNAV, the autopilot or the aircraft's energy state will achieve it.
7. Brief climb gradients and special notes. A SID may require more than the standard climb gradient or specify where a turn may begin. For a requirement stated in feet per nautical mile, approximate required vertical speed with groundspeed × gradient ÷ 60. Use groundspeed, not indicated airspeed; the required vertical speed rises as groundspeed increases.
8. Cross-check the written route description. The plan view, textual description, altitude profile and notes must agree. The text often clarifies instructions that are easy to misread graphically, including heading legs, intercepts, ATC-assigned sections and what happens after a particular fix.

Chart formats and symbols vary, so our broader primer on chart types, legends and pre-flight checks is useful when a symbol or layout is unfamiliar.

How should I load and verify the procedure in the simulator?

1. Establish the expected runway. Use the weather, ATIS and any ATC clearance rather than accepting the runway chosen automatically by the flight planner.
2. Select the exact procedure. Choose the named SID or STAR, the correct runway branch and the cleared transition. A similarly named transition is not interchangeable.
3. Compare the legs page with the chart. Work fix by fix and verify the order, courses, altitude constraints and speeds. Inspect the map as a secondary check, not as proof that the route is correct.
4. Identify special leg types. Heading-to-intercept, course-to-altitude, radius-to-fix and vector legs may be drawn or flown differently by basic GPS units and add-on aircraft. Do not replace them automatically with direct-to-fix legs.
5. Check the vertical plan. Confirm the SID's initial or top altitude where applicable, and make sure the STAR descent is physically achievable. Published constraints do not by themselves authorise a climb or descent beyond the altitude cleared by ATC.
6. Recheck after any runway change. Reselect the runway transition and approach, then inspect the route for loops, duplicated fixes, gaps and obsolete constraints.

A mistake we see constantly is trusting an automatically generated route because it draws a plausible magenta line. Microsoft Flight Simulator users can follow our process for checking an MSFS plan for discontinuities, duplicate fixes and runway conflicts.

Why do the chart and FMS not match?

The usual cause is mismatched navigation data: the chart and the simulator's FMS represent different procedure revisions. A renamed transition, missing fix or different procedure number is a strong warning that their data cycles do not agree.

• Verify that the chart and FMS show the same procedure name and revision.
• Use matching chart and navigation-data cycles where possible.
• Expect small course differences from rounding or magnetic-variation updates; investigate route or fix differences rather than editing every one-degree discrepancy.
• Check whether the aircraft supports the coded leg. An unsupported turn or arc may be simplified even when the database is correct.
• Do not improvise a real-world procedure from conflicting data. In a simulator, manual construction can be useful for practice, but every leg and restriction still needs checking against one consistent chart.

How should I handle vectors and route discontinuities?

A vector or manual discontinuity can be an intentional part of the procedure, not an FMS error. It tells the crew to expect radar headings or another clearance before joining the next leg.

Do not delete every discontinuity and connect the surrounding fixes directly. That can create an uncharted shortcut through terrain, restricted airspace or conflicting traffic. Under ATC, use heading mode and join the next leg when cleared; without ATC, brief a sensible simulated vector before departure or descent and maintain terrain clearance.

A runway change can also create a genuine gap or duplicate a fix shared by the STAR and approach. Reload the affected runway transition and approach, then inspect the full route before activating it.

Does a STAR include the instrument approach?

A STAR normally ends at a terminal fix or approach feeder; it does not replace the instrument approach. Some arrivals are runway-specific or connect neatly to an approach transition, but the approach remains a separate procedure with its own minima, courses and missed-approach instructions.

Brief the STAR, approach and missed approach as connected but distinct parts of the flight. Our complete simulated IFR workflow shows where departure, en-route, arrival and approach preparation fit together.