"...Bob Ainsworth & the one eyed jock maniac should be f***** sideways with an A sized sonobuoy...."
"I have to disagree Spock old mate. A 1c sonobuoy would be much more effective - bigger thicker and with more knobbly bits!!"
Nah, you want to ask the Insties if they still have the dummy sonobuoy used for launcher checks. When I say "used" I mean it was tried once in the mid-eighties but, because it was so heavy, it made a hole in the pan when it dropped out the launcher.
Thereafter it retired and when not on display on the Nav Inst TM's desk it toured the world as a stowaway hidden in kitbags.
Some said it was radioactive.