Edson 4° Wedge for Under Vision Mounting Plate

The Edson 4° Wedge for Under Vision Mounting Plate is a precision correction tool designed for powerboat operators who run radar systems. When your vessel is underway, dynamic bow rise naturally angles the radar dome upward, degrading signal accuracy and effective range. This wedge solves that problem by providing a fixed 4-degree compensation angle that realigns your radar antenna to optimal vertical orientation, ensuring consistent target detection regardless of sea state or throttle position.

Manufactured by Edson Marine—a trusted name in marine instrument mounting since the 1960s—this wedge installs directly beneath your Under Vision mounting plate using the same fastener pattern, requiring no modification to existing hardware or radar installation. The compact 5 × 1 × 5 inch profile and lightweight 0.3-pound construction make it an invisible but critical addition to your electronics suite. The precision-molded design maintains consistent 4-degree offset across the full scanning head, eliminating the angular distortion that can reduce radar range by 20–30 percent on hard-running boats.

Boaters with center console, express cruiser, or performance hull designs benefit most from this correction, particularly those operating in congested waterways or low-visibility conditions where radar reliability directly impacts safety. Installation takes minutes—simply remove your existing mounting plate, slide the wedge into position, and reinstall the plate with original fasteners. If you run an Edson Under Vision mounting plate and notice radar targets appearing inconsistently or range seeming shorter than expected when running at cruise speeds, this wedge is the proven fix.