In Scala2, Lost is displayed instead of spread distance

It is written Lost instead of spread distance data.

Trawl doors may not be aligned or may lay on their side.
  1. Check the pitch and roll.
  2. If needed, pull the warps to align the doors or set them back upright.

Master and Starboard sensors have been inverted on the doors. In that case, you will also have wrong pitch and roll values.
  • Open the pocket and check the top of the housing of the sensor: the one with a green marker must be on the starboard side and the one with a red marker on the port side. If there is no marker on the top, remove the sensor and check on the side if there is a marker. The side of the transducer with a circle must be oriented towards the outside.

If you used to have correct data and suddenly lost them, the up or down component in the transducer may be broken.
  1. Remove sensors from the doors and check from the office if Lost is still displayed.
  2. If yes, see with support service for repair.

Distance between trawl doors is more than 255 m (signal is lost at 256 m, ±1 m) and the sensor telegram does not cover such a distance.