I read in !emc-pstc that Wan Juang Foo <f...@np.edu.sg> wrote (in <of20fd77f8.c4438312-on48256b3b.002ee...@np.edu.sg>) about 'EMC-related safety issues', on Tue, 8 Jan 2002: >EMI from the ASMD (anti ship missile defence) radar had cause >the communication equipment to be inoperable. During this brief period, an >Exocet missile was not seen homing in on HMS Sheffield
According to a TV documentary the other day, the two systems were on nearly the same frequency, so this was really a case of a clash between military and civilian spectrum usage rather than normal EMC. Note 'usage'; at that time the military had almost carte blanche on spectrum usage, especially in a combat situation. Presumably the Commander (E) should have ditched the satellite link, but the TV documentary said that the surveillance radar lost the echoes from the Super-Etandards flying at zero altitude and the potential threat was not passed on to Commander (E). The moral here is that you ALWAYS give Jack-the-Operator the benefit of the doubt if he says he saw or heard something, whether it's radar or ASDIC. These days, it is at least alleged that there is much better co- ordination between the UK military and the civil authority on spectrum usage. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
