1. Aviation obstruction lights and other indicator lights should be provided for height-limited or super high-rise buildings and structures for airport clearance protection.
2. The artificial and natural obstacles that affect flight safety on aviation routes and around the flight area shall be equipped with aviation obstacle lights and other indicator lights.
3. For towering ground and high-rise buildings and facilities that may affect flight safety, aviation obstruction lights and other marking lamps should be installed and maintained in normal conditions.
4. Departments of public security, fire protection, and transportation have built helipads in cities. The sky above the city is regarded as clear air. Tall buildings and structures in the city should be equipped with aviation obstruction lights and other signs.
5. The marine channel should be equipped with aviation obstruction lights and other marking lamps.
2. Relevant standard regulations and suggestions for aviation obstruction lights:
"Civil Airport Flight Area Technical Standard (MH51002000)", Annex 14 of "International Standards and Construction Measures Airport" issued by the International Civil Aviation Organization and the ******** civil aviation industry standard "Aviation Obstruction Lights (MH/T6012-1999) )".
The obstruction lights have the following regulations: The aviation obstruction lights set up by obstacles must be flashing so that they can be clearly distinguished from the constant light source on the ground when viewed in the air and can reach the specified long visual distance.
3. Classification of aviation obstruction lights:
According to Annex XIV of "International Standards and Recommended Practices Airports" issued by MH/T60121999 ICAO, obstruction lights are divided into three categories: low intensity, medium intensity and high intensity:
1. The low-intensity obstruction light is constant light, red, and the peak light is stronger than 32.5cd. Generally, it is not used alone, but must be used in conjunction with medium-intensity and high-intensity obstruction lights. For example, buildings and their facilities above 45 meters are equipped with multi-layer medium-intensity or high-intensity obstruction lights, and low-intensity obstruction lights can be installed between medium-intensity or high-intensity obstruction lights. (The low-intensity obstruction light is red, and the effective light intensity is 100cd±25%).
2. Medium intensity obstruction lights are divided into three types according to luminous requirements:
a. The medium intensity A-type obstruction light is a white flash with an effective light intensity of 20000cd-2000cd. It is used for high-rise buildings and facilities above 105 meters and obstacles with strong background light or used with high-intensity B-type light dimming.
b. Medium-intensity B-type obstruction lights are red flashes with an effective light intensity of 2000cd±25%. They are used in buildings and facilities below 105 meters or used in conjunction with medium-intensity A-type and high-intensity A-type obstruction lights.
3. The high-intensity obstacle lights are divided into two types according to the luminous requirements:
a. The high-intensity A-type obstruction light is a white flash, and it flashes with variable intensity at day, dusk or dawn and night. The effective light intensity is 200000cd±25% in daytime; 20000cd±25% at dusk or dawn; 2000cd±25% at night ; Mainly used for high-rise buildings and other facilities over 150 meters, and used in conjunction with medium-strength obstruction lights.
b. The high-intensity B-type obstruction light is a white flash, and it flashes simultaneously at three levels of variable light intensity in day and night, dusk or dawn and night, and the effective light intensity is 100,000 cd ± 25% in daytime; 20000 cd ± 25% at dusk or dawn; 2000cd±25% at night, mainly used for marking electric wires, cable towers and high-voltage transmission line towers.