&gt; Surface warships are also degaussed to help avoid magnetically triggered mines.<p>I believe the large pipe seen in this photograph running along the hull of the Queen Elizabeth, as fitted out as a WW2 troop transport, contained wires for degaussing.<p><a href="http:&#x2F;&#x2F;www.ssmaritime.com&#x2F;RMS-Queen-Elizabeth-War-Trooper-2.jpg" rel="nofollow">http:&#x2F;&#x2F;www.ssmaritime.com&#x2F;RMS-Queen-Elizabeth-War-Trooper-2....</a>