The problem with coming in to a strange harbor at night is determining which lights are which. Which are the ATONs, marking a jetty, a shoal, a side of the channel? And which are merely background lights – a house, a car, a bridge? I once cruised down the Florida Keys in a fast boat after dark and thought I was looking at lights marking one of the resort marinas I was aiming for, until I realized the lights were from a night game at a Little League baseball diamond. Time to throttle back. For navigating at night, you can…