Here is an interesting situation that happened about a year ago. In February and March 2010 I set up flights between various Florida airports that were ready to takeoff and saved the flights prior to takeoff. When the flights were loaded at a later date they were set to go. Verify position in the FMC thru the CDU, press the thrust button, rotate, and away you go. Weather, STARS, route, SIDS, season, time of day, payload, amout of fuel were already in the saved flight. Several months later, I started to update the AIRAC cycles monthly. So waypoints especially in SIDS and STARS were starting to disappear from the procedures but this made no difference in LNAV or flying to waypoints which no longer exsisted. This led to the conclussion that LNAV was not navigating from name to name but from coordinate to coordinate.The name of a waypoint was shorthand for the coordinate. If I wanted to I could make a flightplan that consisted of nothing but coordinates. Am I thinking correctly or is this just all screwed up?

Thank you
Michael Cubine