Trawl Bottom Contact Sensor
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WONDERING IF YOUR TRAWL IS ON BOTTOM? THE NOTUS BOTTOM CONTACT SENSOR GIVES THE ANSWER. Why bottom contact? A SINGLE SYSTEM WILL: • When bottom trawling, catch is greatly reduced when the footgear comes off bottom. This sensor will indicate when bottom contact is lost. • Instantly see if you are going too fast into the current and lifting the trawl off bottom. • For scientific studies, bottom contact information is essential in swept area calculations. How it works. • The sensor uses an inclinometer to give the angle of the sensor. • When on bottom, the sensor is horizontal. For example, it will provide an angle of 90 degrees. • When off bottom, the sensor is more vertical. For example, it will provide an angle of 5 degrees. Installation • The bottom contact sensor is attached to the combination wire behind the footgear. • A rugged stainless steel housing is provided for attachment and protection. GEAR LOCATION

BOTTOM CONTACT SENSOR SPECIFICATIONS Technical Specifications: • Battery: NiMh • Charge Time: 1.5 hours • Angle Measurement: 0 degrees to 180 degrees • Frequency: 24 kHz • Range: up to 2000 meters depending on acoustic environment • Accuracy: +/- 0.5 degrees • Acoustic Pattern: Omnidirectional Notus Electronics Ltd. 391 Empire Ave., St. John’s, NL Canada, A1E 1W6 Tel: +1 709 753 0652 Fax: +1 709 753 0651 francis@notus.ca www.notus.ca Notus UK Ltd. 5 Harbour Rd., Fraserburgh United Kingdom, AB439TB Tel: +44 1346 512 944 Fax: +44 1346 512 535 james@notusuk.com www.notusuk.com Notus Spain...