Altitude Nomenclature Incorrect.

Mission Planner currently refers to Absolute Altitude as (from as best I can gather from googling!) as being the equivalent of AMSL.

Standard Aviation language is that Absolute Altitude is height above terrain or AGL.

This could lead to some unintended flight paths!

The issue names no files, tests, or entry points. Start by locating where Mission Planner displays or uses the Absolute Altitude and AMSL labels, then compare those uses with the stated aviation terminology. Done means the relevant labels and flight-planning behavior consistently distinguish altitude above terrain from altitude above mean sea level.

Written by the indexing model from the issue text.