Designating A User Waypoint As An Airfield - BENDIXKing AeroNav 910 Pilot's Manual

AeroNav 900/880 Series Pilot's Guide

DESIGNATING A USER WAYPOINT AS AN AIRFIELD

To designate a user waypoint as an airfield, the waypoint must be
manually named using the format "AIRPORT XXXXXFT" where
XXXX is the field's elevation and note that the space is critical in
naming the point.
User Waypoint Airfield Naming Example
89000039-010
Rev 1 May 2019 FMS Subsystem 3-51