PADI Scuba Nav-Finder Underwater Navigation Tool NEW SEALED NOS Patent 1992
This is a genuine PADI Nav-Finder, a precision underwater analog computer used for dead-reckoning and search patterns. Includes: One (1) Sealed Nav-Finder unit. • Dead-Reckoning Pro: Easily calculate Reciprocal Headings, «Across» legs, and «Down» legs for grid searches and underwater mapping.