Bridle Angle and Wing End Spread calculations

Alternative names

  • Sweep Angle, Bridle angle, calculations, gear spread, wing end spread, door spread

Knowing the Bridle or Sweep Angle and the Wing End Spread of his gear will help the skipper better understand the efficiency of his trawl gear. It is important for any trawl skipper to know what these parameters are for his own gear . This information sheet out lines one method of estimating each parameter using easily known details of the gear. This sheet includes an explanation of the calculations and the various formula used. An automated version of this calculation is available at Calculating the Sweep Angle and Wing end Spread of a single Demersal Trawl.

An illustration demonstrating the measurements that can be calculated between the door spread, angle of the bridle and distance between the wing ends
An aerial view of a trawl