READY TO BE AMAZED?” asked Skipper Gentry, a Simradsponsored professional fisherman and the owner of Carolina Gentleman, a 46-foot Post. He then cut the boat’s speed to a crawl and, calmly swinging the helm 90 degrees to port, filled our flybridge view with nothing but a looming Florida Keys seawall: sand, grasses, shrubbery, jagged rocks and the errant sun-dozing iguana. Normally, this would be cause for serious concern about life and limb, or at least impending calamity, but not aboard this vessel. Carolina Gentleman carries a state-of-the-art Simrad helm that includes, among other now-generation electronics, the ForwardScan sonar transducer, which provides a forward-looking perspective of what lurks ahead of and below the bow stem. I glanced at the sheer wall of terra firma on a 16-inch display, and ForwardScan’s collision-avoidance…