How do I use a Garmin GNS 500 in a flight simulator?

To use a Garmin GNS 500 in a flight simulator, confirm the unit's position, select GPS as the CDI source, enter or activate a route, verify the active magenta leg, then arm the autopilot's NAV mode when required. Load approaches through PROC and monitor every waypoint change rather than trusting automation blindly.

“Garmin GNS 500” is often used loosely for Garmin's 500-series navigators. For Aviation & Real-World Flying practice, identify the simulated model before assuming it has radios, WAAS capability or the same autopilot integration as another aircraft.

Which Garmin 500-series unit does the simulator model?

The displayed model determines which navigation sources and approaches are available.

Aircraft add-ons can also replace the simulator's default navigator with their own implementation. For a control-by-control example, see our practical GNS 530 route-entry and control workflow for MSFS 2020.

What do the main GNS 500 controls do?

The right-hand concentric knobs select pages and edit data, while dedicated keys manage routes, procedures and source selection.

• Right knobs: with the cursor off, the large knob changes page groups and the small knob changes pages. Press the knob to activate the cursor; the large knob then moves between fields and the small knob changes characters or choices.
• FPL: opens the active flight plan and stored routes.
• Direct-To: creates immediate guidance from the present position to a selected waypoint.
• PROC: loads or activates departures, arrivals and approaches where the database and simulated unit support them.
• CDI or panel GPS/NAV switch: selects GPS guidance or the conventional VLOC source.
• OBS: stops automatic waypoint sequencing or releases a suspended leg, depending on the flight phase and annunciation.
• ENT and CLR: accept an entry or back out of it. On faithful implementations, holding CLR returns to the default navigation page.

A mistake we see constantly is treating the moving map as proof that the aircraft is following GPS. The map may show a magenta route while the CDI and autopilot are still listening to VLOC. Our explanation of GPS position, course and CDI indications covers the underlying relationship.

How do I set up and navigate with the GNS 500?

Set up the source first, enter the route, activate the intended leg, then couple and cross-check the guidance.

1. Power and initialise the unit. Turn on the aircraft's electrical and avionics systems, acknowledge the start-up page if one appears, and check that the map position matches the aircraft. A simulator's navigation database may not match its flight planner or scenery, so verify the available procedures rather than assuming they are identical.
2. Select the navigation source. Choose GPS for a GPS flight plan or RNAV procedure. Choose VLOC for a VOR, localiser or ILS. On some panels this is done with the unit's CDI key; others use an external GPS/NAV switch.
3. Enter or inspect the flight plan. Press FPL, activate the cursor and enter waypoint identifiers in order, confirming each with ENT. If the simulator has inserted a route automatically, inspect every leg because departures, arrivals and approaches may not transfer.
4. Activate the correct leg. Confirm the FROM and TO waypoints, desired track and highlighted magenta leg. If the active leg is behind the aircraft, highlight the intended leg and use the unit's activate-leg command rather than waiting for it to correct itself.
5. Intercept the course. Fly a heading that will intercept the GPS course instead of engaging NAV while far outside the autopilot's capture limits. Check that CDI deflection is moving towards the centre and that distance to the active waypoint is decreasing.
6. Couple the autopilot if required. With GPS selected, arm NAV mode. The GNS supplies lateral guidance; the autopilot follows it. The navigator does not control the aircraft by itself, and many installations will not follow altitude constraints or advisory vertical navigation.
7. Monitor waypoint sequencing. At each fix, check that the next leg becomes active and makes sense. If sequencing stops, look for OBS or SUSP, a route discontinuity, or a manual leg that requires pilot action.

Should I use Direct-To or a flight plan?

Use Direct-To for clearance to a single fix or quick VFR navigation; use a flight plan for airways, multi-leg routes, arrivals and approaches.

To use Direct-To, press the key, enter or select the waypoint identifier, verify that it is the correct waypoint and activate it with ENT. The resulting course normally runs from the aircraft's present position straight to that fix—it does not preserve an airway or automatically satisfy a published procedure.

Duplicate identifiers are a real trap. Check the waypoint type, region, bearing and distance before activation. If Direct-To interrupts an existing route, inspect which leg will become active after reaching the selected fix.

How do I fly an approach with the GNS 500?

Load the cleared procedure in advance, but activate it only when the aircraft is correctly positioned and the clearance calls for it.

1. Select the procedure. Press PROC, choose the destination approach and select the transition matching the expected clearance.
2. Load rather than activate early. Loading adds the procedure without abandoning the en-route leg. Activating too soon can send the aircraft towards an initial approach fix before intended.
3. Avoid premature vectors-to-final. This option can bypass feeder and initial legs. Use it only when receiving vectors to intercept the final approach course.
4. Set the correct source. Remain on GPS for an RNAV approach. For an ILS, tune and identify the localiser, then select VLOC unless the simulated installation performs and clearly annunciates an automatic changeover.
5. Arm the appropriate autopilot mode. NAV normally handles en-route lateral guidance; APR is used for a supported final approach. Vertical capture requires both a suitable approach and a unit/autopilot combination that models it.
6. Manage the missed approach. Many 500-series units show SUSP at the missed-approach point. After commencing the missed approach, release the suspension when appropriate so the navigator can sequence to the missed-approach legs.

An LPV glidepath requires a WAAS-capable implementation and an LPV procedure. LNAV+V is advisory vertical guidance, not the same as an LPV glidepath. For the complete sequence of checks and mode changes, use our detailed MSFS GPS and RNAV approach procedure.

Why will the autopilot not follow the GNS 500?

Most tracking failures come from the wrong CDI source, the wrong autopilot mode, an inactive leg or suspended waypoint sequencing.

Is a simulated GNS 500 realistic enough for training?

A well-modelled GNS 500-series unit is useful for practising data entry, source selection, instrument scanning and approach flow, but it is not a substitute for approved aircraft documentation or instruction.

Simulator implementations can differ in CDI scaling, database content, radio integration, autopilot capture and missed-approach logic. Our overview of what home flight simulation can and cannot teach explains that boundary. For real aircraft operations, use the exact unit manual, aircraft supplement, current approved data and guidance from a qualified instructor.