Headlamps compliment rather than compete with traditional hand-held flashlights. Lighting of more than one kind is invaluable on board, and headlamps have the advantage of freeing up the two hands of the sailor who always seems to need a third. Our test focused on LED headlamps that claimed water resistance and featured a crosshead strap for comfort, and did not require a battery recharge. We tested 17 headlamps from six manufacturers: Icon from Black Diamond, a rock-climbing and skiing gear maker; the HeadsUp Recoil 2680 from Pelican, maker of all things watertight; and Vizion from Underwater Kinetics, along with four headlamps from Petzl, five from Princeton Tec, and five from…