Elements such as sky condition, visibility, and present weather; augmented observations use a fixed time, spatial averaging technique to describe the visual elements, while an AMOS will use a fixed location, time-linear technique.

• A. Objective Elements
• B. AMOS Elements
• C. Subjective Elements
• D. Visual Elements

Answer: (C)

The main idea here is that sky condition, visibility, and present weather are decided through human judgment rather than purely by automated measurements. These visual elements depend on how an observer interprets what they see over a region and over time, blending multiple cues such as cloud cover, obstruction, light, and precipitation. Augmented observations describe these visual elements by looking at an area and averaging over a fixed time window, which naturally introduces subjective interpretation because different observers might perceive the same scene a bit differently. An AMOS, on the other hand, relies on instruments at a fixed location and records data in a consistent time-series, providing more objective, instrument-derived readings for those same visuals. Because the elements listed hinge on human assessment rather than solely on fixed-instrument measurements, they are classified as subjective elements.