Norway’s Navisafe offers a number of portable battery-powered U.S. Coast Guard-approved running lights, including a white standard navigation light, a Navi TriColor light and, most recently, the Navi rescue light. All three LED lights run off three AAA batteries and are visible from two nautical miles or more. The rescue light, which is waterproof and measures just under 2in across, has an illuminated switch to make it easier to find at night. In addition to functioning as a rescue light, it can also be used as an anchor light, cabin light, masthead light or stern light. $59.Navisafe
