Which statement is true regarding Minimum Safe Altitudes (MSAs)?

Minimum Safe Altitudes (MSAs) are designed to ensure that aircraft maintain a safe distance above ground obstacles, providing an essential safety buffer during the approach and departure phases of flight. The statement about MSAs providing a vertical clearance of 1,000 feet above obstacles is accurate, as this standard is in place to account for both terrain and any other objects that may pose a risk to safe flight. This clearance helps pilots navigate around potential hazards, thus enhancing the safety of flight operations.

The other statements do not align with the definition and purpose of MSAs. For instance, MSAs are not specific to aircraft type, meaning they apply across different categories of aircraft without variation. Furthermore, MSAs are useful in all types of terrain, including but not limited to mountainous areas, which makes the assertion that they are only applicable in such terrains incorrect. Lastly, while MSAs provide a buffer for obstacle avoidance, they do not eliminate the need for pilots to actively monitor and avoid obstacles, which is a continuous aspect of flying.