Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!mcvax!ukc!stc!idec!camcon!mb From: mb@camcon.co.uk (Mike Bell) Newsgroups: sci.electronics Subject: Re: Info Wanted: DECCA Navigation Message-ID: <674@titan.camcon.co.uk> Date: Thu, 2-Jul-87 07:20:22 EDT Article-I.D.: titan.674 Posted: Thu Jul 2 07:20:22 1987 Date-Received: Sun, 12-Jul-87 11:32:21 EDT References: <642@ge-dab.UUCP> Organization: Cambridge Consultants Ltd., Cambridge, UK Lines: 28 > Anyway, this fellow's receiver worked real well and sold for > the price of about a 6 month Decca lease. After many canceled > leases the boys at Decca found out what was going on and they > got one of his receivers, analyzed it and found that by > slightly changing the signal the bogus receiver dooesn't > track anymore. But it didn't effect the mechanical works in a > "real" Decca receiver. (Arthur) I bounced this story off an ex-DECCA employee. He said it sounded unlikely, because the specification of the DECCA signals are actually layed down by legal statute, so unless the fellow's receiver relied on something which wasn't in that specification... [There was no love lost between the ex-DECCA employee and Racal-Decca, so I have no reason to doubt this...] Apocryphal story: apparently it used to be quite common for ships to travel along the lines of constant phase - resulting in the occasional collision between ships travelling along the same line in opposite directions (usual disclaimers...) -- --------------- UUCP: ...seismo!mcvax!ukc!camcon!mb -- Mike Bell -- or: mb%camcon.uucp --------------- Phone: +44 223 358855