1. Fixed obstacles within 3000M from the inner edge of the take-off climbing surface and protruding above the surface should be marked; if the runway is used at night, it should also be illuminated.
2. Objects adjacent to the take-off climbing surface, although they have not yet constituted an obstacle, should be marked if it is deemed necessary to ensure that the aircraft can avoid it; if the runway is for night use, it should also be illuminated.
3. Fixed obstacles protruding from the inner edge of the approach surface within 3000M and above the surface or the inner transition surface shall be marked; if the runway is used at night, it shall also be illuminated.
4. Fixed obstacles protruding above the water level must be marked; if the runway is used at night, it should also be illuminated.
5. Fixed objects protruding above the protective surface of obstacles should be marked; if the runway is for night use, it must also be illuminated.
6. In the aircraft movement area, all vehicles and moving objects are obstructions outside the aircraft and must be marked. If used at night or under low visibility conditions, they must also be illuminated. Only aircraft that are used only on the apron Maintenance equipment and vehicles can be exceptions.
7. The vertical aviation ground lights in the aircraft movement area must be marked to make them distinct and eye-catching during the day, but no obstruction lights shall be set on the vertical lights and signs.
8. All obstacles within the prescribed minimum distance from the taxiway, apron taxiway or the center line of the aircraft taxiway must be marked, and if these taxiways or taxiways are used at night, they must also be illuminated. .
9. In areas outside the restricted area of obstacles, obstacles with a height greater than 150M above the surrounding ground should be marked and illuminated if they are deemed to have constituted a hazard to the aircraft through special navigation studies, but if the obstacle is equipped with For high-intensity obstruction lights that operate during the day, the signs can be omitted.
10. Overhead wires or cables across rivers, valleys, or highways, etc., if it is considered by navigation studies that these wires or cables may pose a hazard to the aircraft, they should be marked and their supporting towers should be marked and illuminated. There are high-intensity obstruction lights that operate during the day, so the sign can be omitted.
11. When it has been determined that it is not practical to install markers on overhead wires or cables that should be marked, B-type high-intensity aviation obstruction lights that operate during the day should be installed on the supporting poles.