THE RE­CRE­ATIONAL EX­PLORER

Boating - - MOTORHEAD -

Don’t have room on your boat for a gi­gan­tic AUV or ROV? You can still get de­tailed im­agery of your lo­cal seafloor with ei­ther chirp or sides­can sonar, with com­pa­nies such as Sim­rad, Lowrance, Garmin and Hum­min­bird of­fer­ing ac­ces­si­ble ver­sions of both. One cool multi­beam sonar sys­tem to check out is Fu­runo’s DFF-3D, a phased-ar­ray sys­tem that reads to the side, as well as up and down. Cou­pled with Fu­runo’s com­pact Thru-Hull or Tran­som Mount multi­beam trans­ducer, it can pro­duce tra­di­tional fish-finder graphs, im­agery to ei­ther side of the boat, and de­tailed 3D images of the ocean floor. It has side­bar de­tec­tion up to 650 feet over 120-de­gree swaths, and its main beam can pen­e­trate to over 980 feet di­rectly un­der the boat. While that’s about one-tenth the depth ca­pa­bil­i­ties of Pe­trel’s AUV, it’s enough to pro­vide ex­cep­tional 3D im­agery of your lo­cal ship­wreck so you know where to drop a line or a dive flag.

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