Model number: MKII 6B/258
Date manufactured: 1940's
Period/Dates when in use: WWII
Description: A small telescope that extends down through the floor of an aircraft so the navigator can observe the earth's surface and measure how much the aircraft is drifting due to wind.
Item History: This instrument allows the navigator of a transport aircraft to determine how much the plane is drifting or being "set down" by the wind. It can also be used to determine the wind speed and direction.
Description of operation (342000 bytes)
1735 North Point, San Francisco, CA 94123
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