NORTHSTAR M3 APPROACH GPS NAVIGATOR

This unit is in excellent condition and was working well when removed, but is sold without warranty of any kind. The volatile memory battery was replaced earlier this year. The new battery has a life of around 7 years, I’m told.

Comes with data card, mounting tray and backplate.  The backplate is missing the large 36-pin connector, but this connector is not required for a VFR installation.

 COMPATIBILITY WITH PRIOR NORTHSTAR INSTALLATIONS

·         M1 Loran installations may retain the same mounting tray, but the rear connector plate will need to be replaced or modified.  External CDI, NAV flag, and three annunciator outputs, if installed, are compatible with the M3. The GPS antenna must replace the loran antenna - the same coax may be used, but the loran antenna coupler must be removed.  The M1 cooling fan, if installed, will be acceptable for use with the M3.

·         M2 installations may retain the same mounting tray and connectors.  External CDI and flag connections are identical to the M3.  The four M2 annunciators may be retained with the following changes:

·         "WARN" should be re-labelled "MSG" and the color should be changed from red to amber

·         "VFR" should be re-labelled "APCH" and the color should be green or blue

 The 8100 remote GPS sensor used with the M2, if installed, should be removed.  Antenna wiring must be modified such that the GPS antenna is connected to the tray rather than to the remote sensor.

CDI / ANNUNCIATORS

VFR Installations may use an optional dedicated CDI for the M3.  For this application, the Mid-Continent Instrument Corp. MD40-64 is suggested as a compact installation combining the CDI with the annunciators.  Note that the MD40-64 is specific to the M3 APPROACH.  Some pin assignments may be different from earlier variants of the MD40.