The Walker 4020 Mk2 is an advanced EM Speed Log designed specifically for smaller vessels needing a “Wheelmarked” MED Type Approved system. Its compact size minimizes the number of sub-units required, making installation simpler and reducing overall weight. This model integrates the electronics unit with the speed and distance indicator into a single master unit, offering flexibility for console or bracket mounting. Featuring high-reliability sensors, it includes flush fitting, fixed, and retractable types housed in hull fittings suitable for diverse hull materials like aluminium alloy, steel, GRP, and wood.