| 21. | The gyrocompass was introduced in the early part of the 20th century and inertial navigation in the 1950s.
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| 22. | After reading the gyrocompass article, I spent a long time trying to figure out how it works.
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| 23. | There was an automatic pilot function driven by either gyrocompass or magnetic compass as the input heading source.
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| 24. | On 1 March the U-boat's gyrocompass broke down, necessitating a return to port.
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| 25. | He also was a pioneer of the gyrocompass, being the first to create a full theory of it.
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| 26. | They suffered from gyrocompass failures at high speeds, unhooked bomb shackles, engine fires, and inaccurate cockpit gauges.
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| 27. | When navigating in the Northern Hemisphere, special techniques can be used with Polaris to determine latitude or gyrocompass error.
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| 28. | After eleven months of gyrocompass instruction at the Admiralty Compass Observatory ( Ditton Park, HMS " Victory ".
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| 29. | The outer casing of the gyrocompass device is held in such a way that it remains aligned with the local plumb line.
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| 30. | The vehicle is fitted with a PAZ overpressure NBC system and fire suppression system, and carries a GPK-59 gyrocompass.
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