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Post by admiralhood on Dec 20, 2018 15:52:56 GMT -6
What the heck are you talking about?! West Virginia hit at 23,000 yards on her *first salvo*. I don't think that such a feat was ever matched even in a daytime engagement. Now, Maryland, Pennsylvania, and Mississippi didn't have radar as good as the other the ships, and Maryland had to range visually on the other ships' shell splashes, while Mississippi fired only one salvo and Pennsylvania not at all, but I have *never* heard the accuracy of the USN battle line as a whole at Surigao Strait described as "terrible". I have to admit "terrible" is not a proper term, sorry about that. But from one article I read several years ago(I am trying to find the address online right now), out of the all the 285 shells fired by US battleships that night, only 2 to 6 hit on the IJN Yamashiro.
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Post by oldpop2000 on Dec 20, 2018 16:41:44 GMT -6
Gentlemen: The Yamashiro and Fuso, especially Fuso were sunk by torpedoes. Fuso split in two and sank. Yamashiro actually engaged with her forward turrets but her top works were shattered. But she was sunk by more torpedoes. The old battleships that had crossed the T of the Japanese force, were equipped for land bombardment and as such, did not have many armor piercing shells. They had mostly HE. The tactical document I am providing will give you the exact number of rounds by type and the range of initial firing which If I remember was around 20,500 yards. If you haven't seen this document, it is the most accurate and complete tactical analysis of the Battle of the Surigao Straits. Enjoy but don't blame me if you fall asleep. www.ibiblio.org/hyperwar/USN/rep/Leyte/NWC-5.pdf
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Post by aeson on Dec 20, 2018 17:08:05 GMT -6
Was this possible at the tactical level? Could they triangulate signals when the enemy was close? Or would they just be using it to know the enemy was nearby? If a ship was equipped with at least two widely-separated direction finders, or if two or more ships were sharing bearings to contacts with one another and at least one had a good idea of where the others were, then it'd be within the realm of plausibility. That said, I don't think it's likely to be within the practical capability of a ship or group of ships equipped with early passive radar and mechanical computers; most likely, they wouldn't know more than a rough bearing to whatever was transmitting, and they might only know that something out there is transmitting if they're only equipped with non-directional radar detectors rather than a more complex direction finder.
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Post by oldpop2000 on Dec 20, 2018 18:45:15 GMT -6
Was this possible at the tactical level? Could they triangulate signals when the enemy was close? Or would they just be using it to know the enemy was nearby? If a ship was equipped with at least two widely-separated direction finders, or if two or more ships were sharing bearings to contacts with one another and at least one had a good idea of where the others were, then it'd be within the realm of plausibility. That said, I don't think it's likely to be within the practical capability of a ship or group of ships equipped with early passive radar and mechanical computers; most likely, they wouldn't know more than a rough bearing to whatever was transmitting, and they might only know that something out there is transmitting if they're only equipped with non-directional radar detectors rather than a more complex direction finder. RDF was used more for detecting and locating voice or morse code signal than radar. Radar's generally have a shorter wavelengths and consequently, RDF's cannot located them. The RDF's were used to detect radio signals to German U-boats because the radio's would be used longer on the air. The best radar detectors can be simply dipole antennas although YAGI array is more accurate, a superhet receiver that is tuneable over a particular band and possibly has the ability to change bands. The received signal is then sent through the superhet, the resultant signal is then sent to an A-scope which could tell you the range and bearing is read on the dial corresponding to the antenna position and possible elevation. This is very rudimentary but does have possibilities and is not difficult to build and install on a ship of any size. In a group of ships, with a central CIC the resultant bearings and ranges could be transmitted to this CIC and the ships coordinated. It ain't simple, but it works.
Now, how do you beat these devices? Well you can shut down the radar, change bands or simply reduce power.
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Post by oldpop2000 on Dec 20, 2018 19:09:45 GMT -6
Here is a piece I found, it might help us.
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Post by Deleted on Jan 2, 2019 12:10:03 GMT -6
Thanks old man, my insomnia is cured. Haven't slept that well since I first read the FAR/AIM.
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Post by oldpop2000 on Jan 2, 2019 12:54:28 GMT -6
Thanks old man, my insomnia is cured. Haven't slept that well since I first read the FAR/AIM. Well, that's great, always like to be helpful.
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