What is the minimum climb gradient if not published?

The minimum climb gradient when not published is established based on standard aviation practices and recommendations for safe aircraft operation during the climb phase. A climb gradient of 200 feet per nautical mile is typically the standard used when specific climb gradients are not provided in the approach or departure procedures. This standard allows for adequate terrain clearance and ensures safe operations during initial climb-out phases after takeoff.

In situations where specific climb gradients are not mandated by guidelines or published procedures, using this minimum standard of 200 feet per nautical mile helps pilots maintain awareness of their altitude relative to surrounding terrain, especially in areas where obstacles may pose a risk during ascent. This practice is reflective of the emphasis on safety and is a commonly accepted guideline across aviation operations.