OMARK Obstruction Marking Sphere

Aircraft warning sphere is designed to provide daytime visual warning or nighttime visual warning if comes with reflective tape, for electricity transmission line and overhead wire for aircraft pilots, especially cross river high voltage transmission lines. RedDot OMARKP power line marker ball is made of high-grade polyethylene, With light-weight and integral design, OMARKP marker ball is easier to install on power line.

An aircraft warning marker should be of one color such as aviation orange, white and red. Generally, the marking spheres are placed on the highest line. Where there is more than one line at the highest level, hite and red, or white and orange spheres should be displayed alternately. This alternating color scheme provides the most conspicuity against all back ground.

Aircraft warning sphere-Powerline marker
Aircraft warning sphere-Powerline marker
Aircraft warning sphere-Powerline marker


Visable Distance 1200 meters
Voltage Range <150KV
Conductor Diameter 6mm-26.5mm
Mechanical structure
Color Orange / Red / White
Sphere body Polyethylene
Diameter 300mm
Weight 2.0KG
Thickness 8mm
Optional • Preformed Armor Rods
• Reflective Strip
Warranty 2 Years


  • Compact size, light weight
  • Polyethylene durable material with better weather resistant
  • Eliminating complex fasteners, Integral design makes installation easier
  • One OMARKP sphere can fit all sizes of power line conductor between 6mm and 26.5mm
  • Optional Preformed Armor Rods for fixing OMARKP on power line
  • Optional Reflective tape is more durable and economical solution for night visibility


  • Power transmission Line
  • Overhead line
  • Guyed wire for self-supported guyed tower


  • ICAO Annex 14, 4th Edition, July 2004
  • FAA AC 70/7460-1K, obstruction Marking and Lighting

Order codes

Series Diameter Color Cable diameter(mm) Armor Rods Reflective Strip
OMARK 300mm O(Orange)
Cable diameter

For Example, OMARKP300OAR means a 600mm diameter warning sphere, orange color, with preformed armor rods.


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Industry Solutions

(Aviation Obstruction Light)

  • Telecom & Broadcasting
  • Wind Turbine
  • Power transmission line
  • Tall building
  • Crane
  • Power Plant
  • Smoke stacks & chimney

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