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Old 01-03-2008, 6:50 PM
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Default Practical example of boresighting in the field

This is from the US Naval Institute's Naval History, February 2008, page 26, describing the Thresher (SS-200) attacking a Japanese freighter on the surface.

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At tis point, the captain ordered the deck gun manned. Our solitary deck gun was no ordinary submarine weapon. The small, 3-inch gun put on when the ship[sic!] was built had been removed in Fremantle, Australia, and replaced by a 5-inch/51-caliber gun that had longer range and much more hitting power than the original weapon. In the impending fight the submarine would need all of that power, as the target could now be seen with binoculars to be a large transport with a flat top. In three minutes, the well-trained gun crew had manned the weapon and was ready to fire. However, the pointer and the trainer who aimed the gun could not see the target in the darkness without optical sights, and there were none.

The captain came down from the bridge and ordered two sets of binoculars and some tying cord to be sent to the deck. He gave the binoculars and some cord to each of the aimers and then ordered me, as the gunnery officer, to open the breech of the gun. When the breech was opened, the captain leaned over and, with his own binoculars, sighted through the barrel of the gun. He saw the target and called out, "Mark!" At that call the pointer and trainer each set their binoculars and tied them on the sights. When they reported they were ready, the captain returned to the bridge.
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Old 01-03-2008, 11:13 PM
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That's quick thinking.
When you don't have, you make do!
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Old 01-04-2008, 12:21 AM
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I guess that is why he was the captain...
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