How many edge markers are placed on either side of the threshold and departure ends of the MOS?

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Multiple Choice

How many edge markers are placed on either side of the threshold and departure ends of the MOS?

Edge markers define the visible boundary around the MOS where the threshold and departure ends begin and end operation. They help operators and technicians see, from either approach, exactly where the equipment starts and finishes, reducing the chance of misalignment, overrun, or accidental contact with the ends. The standard calls for ten markers in this area, arranged so there are five on each side of the threshold and departure ends. This symmetric placement provides consistent visibility and safe clearance from both directions. If fewer markers were used, one side could lack adequate indication, while more would not meaningfully improve safety and would add unnecessary cost.

Edge markers define the visible boundary around the MOS where the threshold and departure ends begin and end operation. They help operators and technicians see, from either approach, exactly where the equipment starts and finishes, reducing the chance of misalignment, overrun, or accidental contact with the ends.

The standard calls for ten markers in this area, arranged so there are five on each side of the threshold and departure ends. This symmetric placement provides consistent visibility and safe clearance from both directions. If fewer markers were used, one side could lack adequate indication, while more would not meaningfully improve safety and would add unnecessary cost.

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