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Use of Sonobuoys in WWII[edit]

(See Japanese submarine I-52 (1943) )

According to the article, the submarine was traced and later sunk thanks to sonobouys from TBF Avengers from the USS Bogue.

That article also provides some interesting details (albeit unreferenced) which aren't mentioned in this article:
"Taylor dropped a purple sonobuoy, a newly-developed device that floated, picked up underwater noise, and transmitted it back. A searching aircraft usually dropped these in packs of five, named purple, orange, blue, red and yellow (POBRY); the operator was able to monitor each buoy in turn to listen for sounds emitted by its target."
Maybe this is worth including in some form in the sonobuoy article? Wingman4l7 (talk) 00:51, 26 September 2011 (UTC)

Cost of Sonobuoy Devices[edit]

These things come in loads, and are therefore expendable, is that correct? What is the cost of such equipment? Are these devices inexpensive enough to be used in throw-away mode, like artillery shells or bullets? I'm just wondering how efficient these are. If they are cheap enough, do users deploy tens, or hundreds of them, to saturate an area? Deploying three would seem like a minimum to me. I'm just interested in what the economies of scale are now that they are only 5"! Thanks for any comments! // Brick Thrower 08:35, 4 September 2006 (UTC)

If you do a Google search for sonabuoy and cost, you get a figure of around $ 300. Seaphoto 21:36, 18 September 2006 (UTC)

In the mid-1970s, I heard a figure of $60 for an omnidirectional sonobuoy (SSQ-41, IIRC). The directional passive sonobuoys (SSQ-53?) were around $300. I heard a figure of $500 for an active (command-activated pinger) bouy. We used shedloads of them, ten to thirty in a six to ten hour mission. Spacing was dictated by several factors (five factors IIRC), and ambient noise was a biggie. They had scuttling plugs, with a delay that was user selectable. I believe that the actual figures are still classified, as are the hydrophone depth selections. Think of this: if a sub has moved from the initial search area, the radio frequencies that were in use need to be available in the new search area, so the buoys need to visit Davy Jones. I don't recall of an instance when we would have liked to have one resurface. Efficient? Well, they were quite good, with consistent quality, at least the one made by Magnavox, the primary contractor. The bulk of the solution hinged on ambient noise, proper spacing, the expertise of the operators, and the tactical savvy of the TACCO. Constant training and study. I do believe that the US won the Cold War, albeit at a significant cost. LorenzoB (talk) 06:23, 29 January 2008 (UTC)

I'm not sure why, but shouldn't sonobuoys be useful in the search for aircraft downed in the ocean, particularly if they are fairly inexpensive? Sonobuoy's can be deployed over wide areas and fairly quickly (using aircraft vs. ships). Consider too that the aircraft is usually TRYING to be located with active transponders! Consider the mysterious loss of Malaysia Airlines 370 in March 2014. (talk) 22:48, 7 January 2015 (UTC)

RAF Coastal Command[edit]

RAF Coastal Command in WW II used some sonobuoys under the codename High Tea - there's a picture of a Liberator GR.Mk.VIII that mentions the High Tea name here: [1] —Preceding unsigned comment added by (talk) 14:25, 12 October 2009 (UTC)