RAYMARINE

Sport Fishing - - ECONOMICS -

Raymarine’s RealVi­sion “is a very sim­i­lar con­cept from what we’ve done with down and side imag­ing,” says Adam Mur­phy, global prod­uct man­ager for sonar and radar. “The only thing we had to do was add a sep­a­rate set of re­ceivers to the side imag­ing, which al­lows you to cal­cu­late an­gu­lar dis­tances on re­turns.”

RealVi­sion’s trans­ducer em­ploys “just un­der 10” el­e­ments, Mur­phy says, hedg­ing. Spe­cific el­e­ments send, and oth­ers re­ceive.

The trans­ducer chirps around the 350 kHz fre­quency range. “We pick el­e­ments that are a lit­tle more ex­pen­sive but have a 60 kHz sweep in­side those el­e­ments. That’s what gets us ex­tra res­o­lu­tion,” Mur­phy says.

Raymarine uses in­ter­fer­om­e­try rather than beam steer­ing or form­ing. With RealVi­sion, the boat must be mov­ing. The beam can pick up tar­gets and de­ter­mine their an­gu­lar po­si­tion up to 300 feet away.

Raymarine trans­duc­ers also have an at­ti­tude and head­ing ref­er­ence sys­tem (AHRS), which takes into ac­count the head­ing, mo­tion and roll of the boat to draw a clearer pic­ture. RealVi­sion is built into Ax­iom and Ax­iom Pro units; the en­try price is $1,249 (Ax­iom 7RV and RealVi­sion trans­ducer).

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