Clever quick-reference tools that turn complex rules into something you can read at a glance. The LIGHTrule and ROADrule identify vessel lights, day shapes and buoyage under COLREGS, IALA or the European inland code CEVNI.
Circular slide rules such as the Compute-A-Course and Vectormaster solve time, speed, distance and vector problems, while the three-arm protractor fixes your position from three marks and the Man Overboard wheel guides you through the Williamson Turn.
