Which of the following is considered a supplementary terrain feature?

• A. Hill
• B. Mountain
• C. Cliff
• D. Plain

Answer: (C)

A supplementary terrain feature is classified as a minor feature that can help in navigation and orientation, especially when more significant landmarks are not visible or available. In this context, a cliff serves as a notable supplementary terrain feature because it represents a sharp and distinct elevation change, often marked by steep rock formations. This can provide critical reference points for those navigating in unfamiliar terrain or when orienting maps.

Hills and mountains, while important terrain features, are categorized as major features due to their significant height and prominence in the landscape. Plains, on the other hand, are expansive flat areas that don't provide the same localized information as cliffs do. Therefore, cliffs are distinctly identified as supplementary terrain features, adding valuable detail to route planning and location determinations.