PI Sensor finder
Several of Simrad's PI catch monitoring sensors can with success be applied on a purse seine.
(A) Headrope
The following sensors may be placed on the headrope:
PI Depth How deep can you go?
When the sonar and echo sounder tell you how deep the school goes, it is good to know that you can place your fishing gear at the same depth.
And even better, you can monitor and hold the desired depth. The sensor design is rugged and award-winning, and the Simrad PI Depth catch monitoring sensor is available for three different depth ranges.
PI Temperature Too warm or too cold water?
Fishing in too warm or too cold water may be just a waste of time and money.
The same applies to a pelagic trawl placed on the wrong side of a thermal layer. Using advanced technology, rugged construction and award winning design, the PI Temperature sensor allows you to increase your fishing efficiency.
The PI Temperature sensor tells you the exact sea water temperature while you are fishing. The water temperature is an important parameter. Fish and bait are temperature sensitive, and they are normally found within specific temperature zones for feeding and spawning. However, the temperature layers in the water are changing constantly, and for this reason the temperature must be monitored constantly. Fishing in an area with unfavourable water temperature might be just a waste of time! For any kind of trawling, use this sensor to monitoring and log the temperature. Then, increase your knowledge about the correlation between temperature, fish concentration and catch efficiency. On a purse seine net, monitor the temperature to see when you are passing the thermo-cline.
(B) Footrope
The following sensors may be placed on the footrope:
PI Depth
As above
PI Temperature
As Above
PI Bottom Contact Best at the bottom!
With patented technology and awardwinning design, Simrad provides you full control of the actions that take place at the bottom. Mounted on a bottom trawl, pelagic trawl or purse seine, this sensor will provide the important information when you need it!
The PI Bottom Contact sensor mounted on a bottom trawl will let you know once the trawl lifts a few centimeters above the bottom. You can then immediatley perform the necessary adjustments, and you will not loose any catch.
On a purse seine you will be notified once the seine reaches the bottom, and you can thus fish even on a rough bottom.
On a pelagic trawl, the sensor will notify you once you get near the bottom.
The PI Bottom Contact sensor will let you know immediately if your gear touches the bottom.
Bottow trawl: If your trawl lifts off the bottom, this may cause fish to escape, and hence reduce the catch. This sensor will detect this, and allow you to trim your equipment for perfect balance.
Pelagic trawl: On a pelagic trawl, this sensor proves very useful when the trawl moves downwards. It will let you know immediately if the footrope touches bottom.
Purse seine: When you work with a purse seine, you need to know when the seine reaches the bottom. This sensor will let you know. once it happens.
Danish seine: Used on a Danish seine, the sensor will let you know when the net has a stable bottom contact, and when it is time to haul.
Scientific research: During scientific surveys, an exact definition of towed distance with proper ground gear contact is an essential parameter in bottom trawl swept area estimates of fish abundance. Using a PI Bottom Contact sensor will reduce errors in this key parameter.
PI SeineSounder Dual wireless sensor for depth and height measurements
From its position on the gear, the Simrad PI SeineSounder dual sensor measures both the depth below the surface and the height above the bottom. The Simrad PI SeineSounder is a "dual" sensor, and is performs the following tasks:
It measures the current depth below the sea surface, and transmits the information back to the PI operator unit on the bridge.
It measures the current height above the bottom, and transmits the information back to the PI operator unit on the bridge.
The sensor can either be installed horizontally on a trawl or vertical on a purse seine. A dedicated "sensor key" is used to set up the sensor for these two installation methods.
The Simrad PI SeineSounder is developed in cooperation with the combined Danish seine/purse seiner Trinto and the Institute of Marine Research (IMR) in Norway.
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