STOP RACIAL AND CULTURAL SUPREMACISTS
Similar to commercial ship developments being affordable, repairable onboard with little energy consumption
It can a use a DIY sonar, fishfinder or depth sensor with OS board to signal-K trough OpenCpn using Pypilot or other autopilot, with an alarm or course correction and automatic reefing.
140m range at 10kn-5m/s speed gives 28 seconds of response, placed at 4, 3 or 2m in a self-folding dagger-centre board or front rudder, reducing hull interference and wave reflection. A parabolic dish can modify the azimuth, altitude and range of beam and can be static or make sweeps
Offshore racers and cruisers have collisions with debris, containers, cetaceans (that wander and sleep in the surface), reefs, etc, meaning injured or dead cetaceans, lost appendages and sinking
sailboat, yacht, ship, sistema anticolision, velero, barco, nizam mudadun liltasadum, murakab shiraei, Fáng pèngzhuàng xìtǒng, Chuán, Fānchuán, système anti-collision, voilier
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