A thermal-imaging camera installed on your boat can significantly enhance safety during nighttime operations by clearly letting you see what is ahead and around your boat, even on the darkest or foggiest of nights. Practical Sailor’s review of Flir Systems Inc.’s Navigator II, a thermal-imaging camera that can be mounted on a mast, finds that this kind of camera can aid navigation, man overboard recovery, and security. The equipment comes with a lofty price tag but for some, it will be worth the investment. …