Mid-Continent MD200-306 Course Deviation Indicator

The MD200-306 is a panel-mounted, 3-1/8 inch Course Deviation Indicator (CDI) with an integrated glideslope needle. Manufactured by Mid-Continent Instruments (and also sold under the Garmin brand name), it is designed to interface with VHF navigation receivers, Flight Management Systems (FMS), and WAAS-enabled GPS systems. It is commonly paired with navigators like the Garmin GNS 430/530 series, GNS 480, and SL30.

Description

This unit has been bench tested by an FAA certified repair station and it comes with an 8130 single release dated 5/7/2026.

Key Technical Capabilities
  • Rectilinear Needle Movement: Features perpendicular, flat-tracking deviation bars rather than older pendulum-style needles. This design keeps the horizontal and vertical needles intersecting at true right angles for a more precise visual readout during ILS approaches. 
  • Integral Mode Annunciators: Equipped with built-in, backlit text indicators on the faceplate for NAV, GPS, and BC (Back Course) or VLOC status, reducing the need for external remote switching panels. 
  • True OBS Course Resolver: Contains an internal resolver configuration that transmits Omni Bearing Selector (OBS) feedback directly to the connected GPS or navigation receiver. 
  • Invalid Signal Flag Shutter: Automatically drives the deviation pointers completely out of view when incoming data signals are weak or invalid, reducing the risk of tracking faulty guidance. 
  • Optimized Display Glass: Built with an anti-reflective, non-reflective lens and adjustable internal lighting to preserve pilot visibility during night operations.

Additional information

Part Number

MD200-306

Serial Number

C06-10201

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