If dispatching a flight legally below standard takeoff minimums, what equipment must be available?

If dispatching a flight legally below standard takeoff minimums, what equipment must be available?

• A. 600 TDZ, 600 MID, 600 ROLLOUT and Operative CL, RCLM and/or TDZ and Rollout RVRT 3 RVR systems
• B. 1000 TDZ, 1/2 RVR
• C. 400 TDZ, 1/4 SM
• D. 600 TDZ, 600 MID, 600 ROLLOUT and Operative CL, RCLM and TDZ and Rollout RVRT 3 RVR systems

Answer: (D)

When dispatching a flight below standard takeoff minimums, there must be sufficient and reliable visibility information and runway aids in place. The key requirement is that Runway Visual Range is provided by three operative sensors—touchdown zone, midpoint, and rollout—so the crew has accurate visibility data along the entire takeoff path. In addition, the runway’s visibility-supporting equipment, such as centerline lighting and centerline markings, must be operable to help the crew see and follow the correct runway centerline in low visibility. With all three RVR systems reporting and the runway aids functioning, you can legitimately apply a reduced minimum of 600 feet RVR for each sensor, rather than the higher standard minimums. Options that don’t require all three RVR sensors to be operational or that propose higher minima don’t meet the rule for BTOM, and ones suggesting much lower values or incomplete equipment aren’t aligned with the requirement.

When dispatching a flight below standard takeoff minimums, there must be sufficient and reliable visibility information and runway aids in place. The key requirement is that Runway Visual Range is provided by three operative sensors—touchdown zone, midpoint, and rollout—so the crew has accurate visibility data along the entire takeoff path. In addition, the runway’s visibility-supporting equipment, such as centerline lighting and centerline markings, must be operable to help the crew see and follow the correct runway centerline in low visibility. With all three RVR systems reporting and the runway aids functioning, you can legitimately apply a reduced minimum of 600 feet RVR for each sensor, rather than the higher standard minimums.

Options that don’t require all three RVR sensors to be operational or that propose higher minima don’t meet the rule for BTOM, and ones suggesting much lower values or incomplete equipment aren’t aligned with the requirement.