Accessories52 Apollo GX50/60/65 Installation ManualCOMMERCIALLY AVAILABLEThe following accessories and equipment are available from sources other than Garmin AT.Other suitable equipment may also be available that is not listed here. Although theGX50/60/65 is designed to work with these items, it is the responsibility of the installer toensure the equipment is suitable for the installation (including that the environmental andairworthiness requirements are met), to make proper connections to the equipment, and toensure proper operation is obtained.Annunciator / Relay UnitsTo simplify installation, several annunciator control units are available that combine therequired annunciators, switches, and navigation source selection relays.The MD41-( ) Series GPS annunciator control unit from Mid-Continent Instruments includesall required annunciation for the GX50/60 for non-precision approach and source selectionrelays. The unit is available in both horizontal and vertical configurations and for either 28 or14 volt systems.The Mid-Continent Instrument numbers are:• MD41-728 28 VDC Horizontal mount• MD41-738 28 VDC Vertical mount• MD41-724 14 VDC Horizontal mount• MD41-734 14 VDC Vertical mountAnnunciatorsThere are a number of sources of suitable annunciators. Several possible sources of suitableannunciators are:• Series 814 from West Coast Specialties• Series 582 from Eaton