![]() That is also why if the approach lights are OOS, the visibilty must be at least 0.75 miles because you need to at least be able to see the threshold. At 200 feet, on a 3 degree slope, the threshold is just over 0.7 miles away, so without using the approach lights to descend lower, there is no way to see any of the other visual cues. The whole point of the approach lights is to provide guidance to the runway at minimum visibility or otherwise there would be no way to complete the approach under these conditions, particularly when the visibility at a DH is 1/2 mile. When there are no red terminating/side row bars, the exception to allow continuation below 100 feet above the the TDZE solely based on the approach lights does not apply, but you can continue if you see one of the other listed cues. You can still descend to 100 feet above the TDZE using approach light systems that do not have red terminating or side row bars, it is just that one can’t use the non existent red terminating/side row bars to continue below 100 feet above the TDZE. The most common approach lighting systems MALSR and MALSF systems don’t have any red terminating or side row bars. Red terminating bars or side row bars are only found on the ALSF-1 or ALSF-2. The approach lights are a visual cue, it is just that they can’t be used as a visual cue below 100 feet above the TDZE unless the Red terminating or side row bars are visible. Upon pilot request, adjust the light intensity.I interpret it that it would apply to non precision, APV, and precision Category I approaches. Once RWSL systems are turned off, they must remain off until returned to service by technical operations personnel. When the RWSL Operational Status displays “Lost Comm with System,” consider the RWSL system out of service until checked and confirmed to be operational by technical operations personnel. If the runway is observed to be clear and the lights are still illuminated, then the lights must be turned off and clearance re-issued. If a portion of the runway is not visible from the tower, ATC must visually scan the ASDE system. If a pilot or vehicle report indicates any portion of the RWSL system is on and is not able to accept an ATC clearance thenĪTC must visually scan the entire runway. RWSL is equipped with automatic intensity settings and must be operated on a continuous basis except under the following conditions: If controls are provided, turn the rotating beacon on:īetween sunrise and sunset when the reported ceiling or visibility is below basic VFR minima. If controls are provided, turn the lights on between sunset and sunrise. Requested by a pilot and no other known aircraft will be adversely affected.ĪC 150/5340-30, Design and Installation Details for Airport Visual Aides, contains recommended brightness levels for variable setting taxiway lights. As required by facility directives to meet local conditions.ĭifferent from subparagraphs a, b, or c above, when:.Between sunrise and sunset, turn the lights on as shown in subparagraphs a 1 and a 2 when the surface visibility is less than 2 miles.Until the aircraft has taxied off the landing runway. VFR aircraft-Before the aircraft enters the Class B, Class C, or Class D surface area, and IFR aircraft-Before the aircraft begins final approach, or Before an aircraft taxies onto the runway and until it leaves the Class B, Class C, or Class D surface area. ![]() Between sunset and sunrise, turn the lights on:.Operate the runway edge light system/s serving the runway/s in use as follows: ![]() Operate the SSALR system when the conditions in subparagraph a are not a factor.
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