Simrad PI Spread/Depth sensor Application Trawl
The PI Spread/Depth sensor is designed for pelagic and bottom trawls. It can be used on single and twin trawls, but must be paired with a PI Remote or PI Remote/Depth sensor.
A: The PI Spread/Depth sensor is mounted on the port trawl door
B: The PI Remote (or PI Remote/Depth) sensor is mounted on the starboard trawl door
C: The PI Spread/Depth sensor communicates with the PI system on the vessel. It provides both door spread and depth information
D: Using the transverse communication link, the two sensors measure the physical distance between the trawl doors