Part 5/15:
The main argument against DST’s mirage explanation is the nature and consistency of the observed horizon phenomena. Ships and objects disappearing bottom-up at the horizon happen regardless of environmental conditions, including cold or cloudy days, when mirages are less common. Additionally, disappearances occur in situations where atmospheric refraction would be insufficient or inconsistent to cause complete bottom-up occlusion.
The Role of Observer Height in Horizon Visibility
A crucial factor in understanding why objects disappear bottom-up relates to the observer’s height and line of sight. The higher an observer is above sea level, the farther they can see before Earth's curvature causes obstruction.