MAYDAY SIGNALING MIRROR-HELIOGRAPH SIZE 4″ This innovative mirror is lightweight. Robust and approved for maritime and military use. It is highly reflective giving it a range of more than 10 miles, for the 4″ life raft/rescue boat larger transom Designed for one-handed operation. Precise and effective Floats Robust Quick and easy to use Instructions printed on reverse NATO-approved: NSN-6350-99-613-9818c/w Type-approved logo and approved lanyard.
