Jet climb straight ahead accelerating at 300 knots crossing 5 nm at ____ feet or above during a Case III departure?

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Multiple Choice

Jet climb straight ahead accelerating at 300 knots crossing 5 nm at ____ feet or above during a Case III departure?

Explanation:
This item tests the minimum crossing altitude at a fix on a Case III departure. When climbing straight ahead and accelerating to 300 knots, you must be high enough at a given distance to ensure obstacle clearance. At 5 nautical miles from the runway, the required minimum is 1500 feet. That means by the time you reach 5 NM, you should be at least 1500 ft above mean sea level, which corresponds to a climb gradient of about 300 ft per NM (roughly 2.8 degrees). With 300 knots, you cover that 5 NM in about one minute, so you’d need roughly 1500 ft gained in that minute, i.e., a climb rate around 1500 fpm. Lower altitudes wouldn’t guarantee clearance if climb performance is less than ideal, while a higher altitude is more conservative than the standard requirement. Therefore, 1500 ft is the correct minimum crossing altitude at that point.

This item tests the minimum crossing altitude at a fix on a Case III departure. When climbing straight ahead and accelerating to 300 knots, you must be high enough at a given distance to ensure obstacle clearance. At 5 nautical miles from the runway, the required minimum is 1500 feet. That means by the time you reach 5 NM, you should be at least 1500 ft above mean sea level, which corresponds to a climb gradient of about 300 ft per NM (roughly 2.8 degrees). With 300 knots, you cover that 5 NM in about one minute, so you’d need roughly 1500 ft gained in that minute, i.e., a climb rate around 1500 fpm. Lower altitudes wouldn’t guarantee clearance if climb performance is less than ideal, while a higher altitude is more conservative than the standard requirement. Therefore, 1500 ft is the correct minimum crossing altitude at that point.

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