Sloan Letter Magnetic Distance Chart
400500This durable chart is made of plastic coated galvanized steel with 2 sets of 10 magnetic strips (20 total) with 5 characters on each strip. Meets all qualifying standards for military aviators i.e.: officer candidates, pilots, air crewmen, etc. Approved by the Bureau of Medicine (BUMED). Chart measures 9.5 in x 11 in (24.1 cm x 28 cm).
20 feet, 6 meter testing distance.