Visual separation may be applied between aircraft up to but not including ________________.

Visual separation may be applied between aircraft up to but not including ________________.

• A. FL180
• B. FL200
• C. FL100
• D. FL250

Answer: (A)

Visual separation is a method used only when both aircraft are in visual meteorological conditions and the controller can observe and coordinate them by sight. This approach relies on pilots maintaining visual separation from other traffic, which becomes impractical once you reach higher altitudes where flight levels and instrument procedures dominate. The boundary between visual and instrument separation is the transition altitude, commonly at FL180 (18,000 ft). Below this level, separation can be applied visually; at FL180 and above, separation is provided by instrument-based procedures. So the upper limit where visual separation may be used is just below FL180.

Visual separation is a method used only when both aircraft are in visual meteorological conditions and the controller can observe and coordinate them by sight. This approach relies on pilots maintaining visual separation from other traffic, which becomes impractical once you reach higher altitudes where flight levels and instrument procedures dominate. The boundary between visual and instrument separation is the transition altitude, commonly at FL180 (18,000 ft). Below this level, separation can be applied visually; at FL180 and above, separation is provided by instrument-based procedures. So the upper limit where visual separation may be used is just below FL180.