Agree with all above... with near zero wind/current, a single screw w/bow thruster can walk the boat sideways and I've found the thruster to be almost ineffective with a strong side wind. Just out of curiosity I tried the thruster (at the mooring) with a strong port side wind, and the bow moved to port very little. Now I know what the thruster will do and what it won't do in strong winds. Good lesson learned.
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