During World War II the Mark 5 version was developed to function more like a sextant with a single pivot arm replacing the linear screw worm drive which set the height of the object. The primary benefit of this development was that multiple objects of differing heights could be measured much faster since it removed the slow moving worm drive which would need to be adjusted for each object height before a sight was taken with a much faster adjustable arc arm to set the objects height. Today it is still used aboard US Navy warships at times when using active radar is inadvisable.
Measures approx. * box - 16" x 8" x 6" Marked: * see photos. Condition: Reasonable condition for age. Box shows plenty of scratches and scuffs, but it's still structurally good. *Please review ALL photos, for finite, details of condition. *Visit our "Fifth Avenue," ebay Department Store for over 1000 unique listings! Be sure to add The Rad Gallery to your favorites list !********************************************
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