Over the last 28 years, Notus has supplied advanced trawl monitoring solutions to the west coast trawl fleet.  The Trawlmaster remains a staple for precise monitoring of trawl geometry (including trawl wire lengths).  Echo has been used extensively as the only reliable way to detect shrimp.  While the Mantis Net Sounder provides the highest resolution on the market (640 lines vs industry standard of 100).