Talk:HMS Astute (S119)

message: see the press release: http://www.baesystems.com/Newsroom/NewsReleases/autoGen_1074119838.html
it does claim "In the right conditions it can detect the QE2 leaving New York harbour from the English Channel.", while unlikely, thats the ships manufacturer talking. maybe miscommunication between BAE and Thales, who knows.
Sorry i dont have the time to check the propper syntax for "talk" in wikipedia, hope this helps though
feel free to edit this to your content  —Preceding unsigned comment added by 81.106.142.62 (talk) 10:11, 9 September 2008 (UTC)
thread_title:  Sonar [non-user plug] 

message: From The Telegraph:
"So finally in November 2009, Astute is starting 18 months of sea trials."
Gives an indication that whilst the boat may well be commissioned in 2010, it won't be in active service until 2011. David (talk) 18:23, 16 November 2009 (UTC)
thread_title:  Info on sea trial length 

message: Some disagreement over displacement. Some sources say 7,200 tonnes, some 7,400, the following give 7,800 (submerged) –
See Royal Navy: "When fully stored HMS Astute displaces 7800 tonnes of sea water (equivalent to 65 Blue Whales or nearly 1,000 Double Decker buses);" Defence Procurement Agency: "Dived displacement 7800 tonnes;" BAE Systems: "7800 tonnes submerged;" Defence iQ: "displacement of 7,800 tons submerged;" Naval Technology: "Displacement 7,800t (dived)." GwenChan 21:53, 22 October 2010 (UTC)
replies: text: Above struck; see User talk:Ic451uk. GwenChan 22:34, 22 October 2010 (UTC)
thread_title: Displacement

message: Does anyone know what all the steam from Astute is in all the news footage? I just think it would be a good addition to the article because it's not something normally seen from a nuclear sub. Mark83 (talk) 23:34, 22 October 2010 (UTC)
replies: text: 109 sundodgers brewing up? =) Joking aside, interesting question. GwenChan 23:41, 22 October 2010 (UTC)
replies: text: I wondered that too. I have no inside knowledge, but from the photos and this diagram it seems to be emanating from the diesel exhaust - perhaps they shut down the reactor as a precaution, and were running on auxilliary power? Lynbarn (talk) 00:26, 23 October 2010 (UTC)
replies: text: Agreed - if the submarine is grounded, there is a risk that the seawater cooling supplies to the reactor may be blocked (by mud, etc.), or the intakes may come out of the water.  The reactor is therefore shut down as a precaution - but the submarine still needs power, so the backup diesel generators will be started.  I suspect that efforts are made to cool the exhaust from these generators, both for safety and infra-red detection, and so the exhaust would therefore be visible as the steam (formed from the combustion of a hydrocarbon fuel) condenses to water vapour. Ic451uk (talk) 08:02, 23 October 2010 (UTC)
thread_title:  Steam in footage of grounding 

message: I've reverted the edit that says "It rumoured that repairs will cost £8 million". I've done this because:
# I don't think unsubstantiated rumours are suitable for the encyclopaedia
# The reference quoted makes a number of other errors - in particular citing "the fatal crash of the  FADEC controlled Chinook Mk2 helicopter on the Mull of Kintyre in June 2004" (it was  2 June 1994) and that Astute may be out of service until March 2011 (she sailed on 11 December - although not very successfully!)
Well-referenced sources for repair costs would be useful - but this is not a good source.  Shem (talk) 15:47, 12 December 2010 (UTC)
thread_title:  Rumours of repair cost 

message: Shepherd media got the wrong end of the stick when Ambush and Astute were delivered yesterday. They have not finished sea trials, and they are not yet in service, but they have been delivered by BAE to the RN. The gov.uk article "Sixth Astute Class submarine keel laid" makes this distinction clear. The submarines will be declared "in service" when they are ready to deploy. Although submarines are a bit different in acceptance timelines, we had in similar confusion with the Type 45 commissioned/in service descriptions a few years ago. Shem (talk) 17:09, 19 July 2013 (UTC)
thread_title:  Delivered - not "in service"