The spread on EACH net is provided. Spread reduces fuel by allowing you to keep the optimal door spread.
- Allows you to take equal bulk in EACH net.
- Adjust vessel speed to keep optimal doorspread.
- Indicates when the footgear is going into the mud.
Trawl Warp Measurement
The distance from the vessel to EACH trawl door
- Accurately measures your trawl wires to within 1/2 meter.
- Avoids measuring your trawl wires on shore.
- Indicates the adjustment in cross current to “square” the doors.
Middle Wire Adjustment
The middle wire adjustment is calculated to align the middle weight (clump) with the doors.
- When the clump is ahead of the doors, the trawls overspread.
- When the clump is behind the doors, the trawls under spread which increases gear damage.
The heel angle (inward/outward lean) and pitch angle (upward/downward pitch)
- Set the trawl doors for optimal spread and optimal fuel consumption.
- Indicates if you shoot too much trawl wire as the door heels over.
- Indicates when the doors are on bottom.
Indicates the distance from the headline to the seafloor.
- Indicates when your trawls are on bottom.
- Allows you to raise/lower the headlines depending on species.
Indicates when the cod-end is full.
- Only take back what you can handle onboard.
- Prevents hauling back trawls that are only half full.
- Provides a better indication of where the fish are in the tow.
Indicates if the trawls are on bottom.
- Fishing is greatly reduced once your trawls comes off bottom.
- Indicates if the current is taking the trawl off bottom.
- If you do not shoot enough wire, the trawl will not be on bottom.
Clump Depth and Temperature
- Depth sensors indicate the distance from the surface to the middle weight (clump).
- Ensures the clump remains on bottom.
- Too little wire out or towing too fast can bring the clump off bottom.
- Locates fish by trawling in the right temperature range.
- Avoid by-catch with temperature.
Indicates the sorting grid angle.
- If your grid is not at the right angle, nothing goes to the cod-end.
- Indicates if your grid is blocked.
- Estimate fish volume in the codend as the grid angle tends to increase with volume.
Provides the distance between the wingends.
- Keeping the optimal wing spread can be just as important as doorspread.
- Wingspread is a critical piece of information for researchers in calculating swept area.
Trawl Door Height
Trawl door height monitors the distance from the door to the seafloor.
- Height is critical to the successful operation of semi pelagic doors that fly very close to the bottom.
- Equal door heights translate to optimal fishing.
The distance from the surface to the sensor.
- Ensures you are around the fish before you purse.
- Avoid hookups on the bottom.
- Sink rate tells you how fast the seine is sinking.
Cork Line / Lead Line Alignment
A precise distance is provided to the cork line and to the lead line.
- Instantly see if currents are pushing the lead line away from the vessel.
- The cork line / lead line alignment will indicate if the floats are in line with the lead line. Fish will escape a misaligned seine!
- Provides a much better picture of what the seine looks like under the water
Find the relationship between temperature and catch
- Storing fish at a similar temperature as the sea water increases quality.