Net monitor keeps the fishing gear aligned: Trawlmaster uses acoustic sensors to track trawl doors

One thing about towing a net behind your boat is that once the net and doors drop beneath the surface and head toward the bottom, it’s pretty much a crapshoot as to what’s happening.

You can overspread the gear and not know it. A sweep can break, and you won’t discover it until you haul the gear aboard. Everybody else can be catching fish, and even though the shine on the doors looks just right, you’re just dragging water.