Developed by the United States Power Squadrons, the world's largest private, nonprofit boating organization, Marine Amateur Radio is a complete guide to the use of ham radio for two-way and network communications among boats and between boats and shore stations. Briefly, succinctly, and clearly, thi...

Explorer compass, MFG# B-51, bracket mount, black housing, 2.75" direct reading black dial, moveable sun shield, green illumination, compensators, 5 year warranty.