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Space Sextant

Optics Assembly With Eye Relief Eyepiece
Space Sextant Navigates the Moon Missions
Mock-Up of the Apollo Primary Guidance, Navigation, and Control System
In Their Own Words: Peter Vernam on Sextant Navigation
IMU-3 For Apollo Guidance & Navigation Equipment
The Inertial Measurement Unit: Mechanical Engineering Wizardry
Apollo Primary Navigation, Guidance, and Control System for the Lunar Excursion Module Simulator