Seastar - NFB™ 4.2 Steering Helm - Single - SH4910P. Patented No FeedBack Steering Control for about the cost of an old-fashioned steering replacement. With the advantage of 4.2 turns lock-to-lock and Seastar's patented No FeedBack steering to lock out steering loads, SeaStar Solutions 4.2 Rotary NFB Steering is the ideal single-cable system for most non-power-steered boats.. Type-Single Helm