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Bennett Avionics

Apollo CNX-80 (Garmin GNS-480) WAAS IFR GPS / NAV / COMM / MFD / Moving Map / Glideslope

$5,795.00

Apollo CNX-80 (Garmin GNS-480) WAAS IFR GPS / NAV / COMM / MFD / Moving Map / Glideslope

$5,795.00
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Used
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Product Information
Part Number: P/N: 430-6100-800-002
Condition: Serviceable
Certification: 8130-3
Voltage: 14/28 V
Included: 90 Day Warranty
Included: GPS Antenna, Rack, Connector, Existing Database available at extra cost if needed
Comments: Some of our CNX-80/GNS-480 sales are for customers who are replacing another CNX-80/GNS-480. These customers do not need the GPS antenna, mounting rack, or connectors, and we do not want to charge them for items they do not need.
Comments: If you need these items for a new installation, please choose "Yes" in response to the "Need Installation Hardware" question.

Product Description

The II Morrow Apollo CNX-80 (later rebranded the Garmin GNS-480) was the first integrated General Aviation GPS Navigator with WAAS capability. This radio was far ahead of its time. In fact, we believe that it was the technology in this radio, and the people who created it, which prompted Garmin to purchase UPS Aviation Technologies (UPSAT).

Instead of simply allowing waypoint-by-waypoint navigation, the CNX-80 / GNS-480 is a Flight Management System (FMS). The primary advantage is the ability to selects airways as a whole, rather than enter each of the waypoints which define the airway.  This greatly simplifies the creation of flight plans.  Perhaps more importantly, this makes it faster and easier to change the flight plan on the fly when given changes by ATC.

The disadvantage of the CNX-80 / GNS-480 is that Garmin has announced the end of factory support for this radio, and we have discounted it accordingly. The best uses for the CNX-80 / GNS-480 are as follows:

  • As a very capable WAAS GPS, at a discounted price compared with the Garmin GNS-430W WAAS GPS.
  • As a replacement for another CNX-80 / GNS-480, simplifying installation.

Please note that the CNX-80 / GNS-480 offers 760 COMM channels, so this radio is not the solution to meeting a 8.33 kHz channel spacing requirement.

The two best features of the CNX-80 / GNS-480 are the opening of thousands of runways to precision WAAS GPS approaches, and the ability to provide a WAAS position fix for an ADS-B solution.

WAAS Approach Capability - WAAS, or Wide Area Augmentation System, is a fundamental improvement to GPS accuracy. By adding a series of ground stations and geostationary satellites, WAAS GPS is typically 5 times more accurate than "regular" GPS. This means that it is now possible to fly a complete "Virtual Glideslope" approach into an airport with no local ground-based navigation aids whatsoever. An Apollo CNX-80 (Garmin GNS-480) makes the following approaches available:

  • LNAV (Lateral Navigation): This is a new name for non-precision GPS approaches as we have known them. Like all non-precision approaches, this has a minimum descent altitude (MDA), based on obstructions and terrain.
  • LNAV/VNAV (Lateral Navigation / Vertical Navigation): This class of approach provides Glideslope vertical guidance with a decision altitude (DA) typically 350 feet AGL.
  • LPV (Localizer Performance with Vertical guidance): This is the most precise of the WAAS GPS approaches, the GPS equivalent of a Cat I ILS approach. It also offers Glideslope vertical guidance, but the DA is lower, typically from 200-250 feet AGL.

There are thousands of FAA-approved LPV WAAS approaches, with more being added regularly. The FAA's stated goal is to have a WAAS approach available for every public runway at least 3,200 feet long. To see if the airports you use offer WAAS capability, please click here for the FAA's information about GPS/WAAS Approaches.

ADS-B - The WAAS GPS position fix identified by the CNX-80 / GNS-480 is the foundation for an ADS-B solution.  You may install an ADS-B solution with an internal WAAS GPS, or use the position identified by the CNX-80 / GNS-480.  (Your ADS-B solution would transmit this position for use by the ADS-B system.)

The Apollo CNX-80 / Garmin GNS-480 may be used with any of these Indicators (the Garmin units are the official choices):

If you have any questions about this item, please click Apollo CNX-80 (Garmin GNS-480) WAAS IFR GPS / NAV / COMM / MFD / Moving Map / Glideslope to send us an email.

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