Compare the main navigation methods in flight simulation: pilotage, dead reckoning, VOR/NDB, GPS/RNAV, inertial systems and ATC vectors.
The main navigation methods in flight simulation are visual pilotage, dead reckoning, conventional radio navigation, area navigation (RNAV), inertial navigation and ATC radar vectors. In Aviation & Real-World Flying simulation, pilots usually combine them: an FMS may manage the route, while GPS, radio or inertial sensors establish position and cockpit instruments display guidance.
Main methods of flight navigation compared
Six broad methods cover most civilian simulated flights, although the available equipment depends on the aircraft, period and quality of the simulation.
| Navigation method | What it uses | Best suited to | Common simulator mistake |
|---|---|---|---|
| Visual pilotage | Terrain, coastlines, roads, towns, airports and charts | Local VFR flights and visual arrivals | Assuming every road, mast or airport layout in the scenery matches the chart |
| Dead reckoning | A known position, heading, wind, groundspeed and elapsed time | VFR training, historic aircraft and flights without reliable aids | Using indicated airspeed as groundspeed or making no wind correction |
| Conventional radio navigation | VOR, NDB, DME and localiser signals | Classic IFR routes, older aircraft and radio-navigation practice | Tuning the wrong station, selecting the wrong course or misreading TO/FROM indications |
| Area navigation | GPS/GNSS, DME/DME, inertial position or combined sensors | Waypoint routes, modern airways and RNAV procedures | Following the wrong active leg, an unresolved discontinuity or mismatched navigation data |
| INS or IRS | Gyroscopes and accelerometers measuring the aircraft's movement | Airliners, military aircraft and long over-water flights | Skipping alignment, entering the wrong initial position or ignoring modelled drift |
| ATC vectors | Headings assigned by a controller | Departure, arrival, traffic sequencing and approach interception | Treating the assigned heading as a ground track or expecting the FMS route to sequence correctly |
VFR and IFR are operating rules, not navigation methods. A VFR pilot can use GPS, while an IFR flight may combine RNAV, radio aids, vectors and visual references. These are also methods of flight navigation rather than autopilot modes: heading hold, NAV and LNAV merely command the aircraft to follow selected guidance.
Specialist aircraft may add celestial, Doppler, terrain-referenced or tactical navigation. Those techniques matter in particular historic and military simulations but are not standard equipment in most civilian aircraft.
How does conventional radio navigation work?
Radio navigation derives direction or distance from ground transmitters, with each type of aid presenting different information.
- VOR: defines magnetic radials extending from the station. The selected course, CDI deflection and TO/FROM flag must all be interpreted together.
- NDB and ADF: the ADF points towards an NDB, usually as a relative bearing unless the instrument combines it with heading information.
- DME: gives slant-range distance to a paired or separately tuned transmitter. Close to a station at altitude, that distance can be noticeably greater than horizontal ground distance.
- Localiser and ILS: provide precise approach-course guidance. They are primarily arrival and final-approach aids rather than complete en-route navigation systems.
A VOR radial always extends from the station, even when the aircraft is flying towards it. Reverse sensing and incorrect station identification cause many apparent instrument failures; our guide to tuning, identifying and tracking VORs and NDBs covers the cockpit technique.
What is area navigation, and is it the same as GPS?
Area navigation allows an aircraft to fly between defined fixes without having to pass directly over the ground-based stations used to establish its position.
GPS is only one possible position source for RNAV. An airliner may combine GNSS, inertial reference and DME/DME updating, while the FMS stores the route and calculates the path between fixes. LNAV, NAV or an equivalent lateral mode then commands the flight director or autopilot to follow that path; the exact mode names vary by aircraft.
- GPS or GNSS supplies position, velocity and time.
- RNAV is the capability to fly a defined path between waypoints.
- RNP is RNAV with specified accuracy plus onboard performance monitoring and alerting.
- FMS manages the route and combines available navigation data.
- CDI, HSI or moving map presents guidance to the pilot.
A moving map showing the correct route does not prove that the autopilot is following it. The selected source may still be VOR or localiser, or the autopilot may remain in heading mode. For practical selection criteria, see our comparison of GPS/RNAV and conventional radio navigation.
Which navigation method should you use in free flight?
In free flight, choose the navigation method that matches the aircraft's equipment and the skill you want to practise; Free Flight is a simulator mode, not a navigation method itself.
- Local sightseeing or basic VFR: use visual pilotage, supported by a chart and dead reckoning. Keep the moving map as a position check rather than watching it continuously.
- Cross-country VFR: calculate headings and times, identify checkpoints and use GPS or radio aids to verify progress.
- Classic general-aviation IFR: use VOR, DME and NDB equipment where fitted. Confirm station identity and usable range before trusting an indication.
- Modern light aircraft: use GPS-based RNAV for waypoint navigation, while cross-checking terrain, time, distance and available radio aids.
- Airliner operations: load the route into the FMS, compare every significant waypoint with the plan and inspect the lateral path before engaging LNAV.
- Historic navigation practice: disable or ignore modern overlays that reveal your position. A moving map removes much of the challenge from dead reckoning, celestial or inertial-navigation exercises.
The procedure also has to suit the installed equipment. Do not select an RNAV or RNP procedure merely because it appears in the simulator's flight planner; confirm that the simulated aircraft can load and fly the required legs.
How do navigation methods change during the flight?
During the flight — während des Fluges in German — navigation normally changes by phase rather than relying on one source from take-off to touchdown.
- Plan and verify: check that the aircraft can use the required fixes, airways and procedures. Compare the cockpit route with the intended route rather than assuming an imported plan is correct.
- Establish position: align any inertial system, enter or load the route and confirm the initial position. Some simulated aircraft simplify alignment, while detailed add-ons may require the full process.
- Depart: follow runway alignment, a published departure or an assigned heading. Do not engage route guidance until the expected leg is active and sensible.
- Cross-check en route: compare FMS or GPS position with radio bearings, DME distance, estimated times and visible terrain where practical.
- Transition to the arrival: follow an RNAV arrival, conventional radio procedure or ATC vectors, then select the correct source for the approach.
- Complete visually or on instruments: an instrument approach may end in visual references, while a visual arrival can still use GPS and radio aids for orientation.
Airways illustrate this combination well: a route may be defined by named fixes and VOR radials but flown using GNSS and an FMS. Our explanation of how fixes, radials and airway courses fit together provides the route-planning detail.
How do you recover a missed waypoint or fix and regain course?
Waypoint recovery starts by stabilising the aircraft, identifying the intended leg and deciding whether to intercept the original course or fly directly to a suitable fix.
A fix is a defined geographic position; it does not have to contain a physical beacon. A course is the intended path over the ground, while a bearing is the direction from the aircraft to a point. That distinction matters because Direct-To guidance and the original flight-plan leg may lead to the same fix on different courses.
Should you use Direct-To or intercept the original course?
Use Direct-To when a shortcut to the fix is appropriate; intercept the existing leg when the published or planned inbound course must be preserved.
| Recovery option | What it does | Choose it when |
|---|---|---|
| Direct-To the fix | Creates a new path from the present position to the selected fix | A direct route is acceptable and no required procedure segment is being bypassed |
| Activate and intercept the leg | Retains the programmed course between two route fixes | You need to regain an airway, arrival or other defined inbound course |
| Continue an assigned vector | Maintains the controller's heading instead of returning immediately to the route | ATC is positioning the aircraft and has not instructed it to resume its own navigation |
Do not use Direct-To blindly on an instrument approach, procedure turn, hold or terrain-sensitive segment. It may cut a corner, omit required leg geometry or cause the FMS to sequence past part of the procedure.
- Stabilise the aircraft: hand-fly a safe heading or use heading mode while diagnosing the route. Do not let the autopilot chase a full-scale indication.
- Confirm the navigation source: check whether the CDI or HSI is using GPS/FMS, VOR or localiser guidance.
- Inspect the active leg: identify the previous fix, active waypoint, desired track and any route discontinuity.
- Check why the waypoint was missed: common causes include excessive groundspeed, time acceleration, a late turn, incorrect sequencing or an unsuitable intercept angle.
- Select the recovery: activate the intended leg and intercept it, use Direct-To where appropriate, or continue the assigned vector.
- Choose a controlled intercept: use a modest intercept angle and watch the CDI trend. Large angles close to the course often produce overshoot and repeated S-turns.
- Verify capture and sequencing: confirm that lateral guidance becomes active, the distance decreases and the next waypoint sequences as expected.
If the aircraft is already on an instrument approach and stable recovery is doubtful, discontinue the approach and fly the applicable missed-approach procedure rather than forcing the aeroplane back onto the final course. Real-world operations also require compliance with ATC clearance, current procedures and aircraft limitations.
Why does flight simulator navigation go wrong?
Most simulator navigation failures come from source selection, route state or misunderstood indications rather than a broken instrument.
- The wrong source is selected: the map shows the GPS route while the CDI and autopilot are still connected to VOR or localiser guidance.
- The lateral mode is wrong: entering a route does not make the aircraft follow it. Heading, NAV and LNAV modes have different jobs.
- The wrong FMS leg is active: Direct-To commands, vectors, holds and missed approaches can alter sequencing. Inspect the route after each change.
- A discontinuity remains: many FMS units stop automatic sequencing at a deliberate route gap. Resolve it only after confirming which legs should actually connect.
- Heading and track are confused: heading is where the nose points; track is the path over the ground. Wind makes them differ.
- The radio aid is unsuitable or out of range: VOR reception is largely line-of-sight, NDB range varies and a DME transmitter may not be co-located with the selected aid.
- Chart and database data differ: waypoint names, procedures and runway details can vary when the simulator, aircraft and chart represent different data cycles.
- Time acceleration causes overshoot: high simulation rates can interfere with turn anticipation, autopilot capture and waypoint sequencing, particularly near closely spaced fixes.
- No independent check is made: compare bearing, distance, estimated time and visible position whenever another source is available.
A mistake we see constantly is trusting the magenta route without checking the source annunciation. Learning how to read an HSI and confirm its selected navigation source prevents many cases where the aircraft appears to ignore a perfectly valid flight plan.