Template:Did you know nominations/Boom (navigational barrier)

Boom (navigational barrier)

 * ... that heavy chains (pictured) were used to block rivers and harbours in order to keep enemy ships out or collect tolls?
 * Alt 1: ... that chain booms (pictured) were used to block rivers and harbours in order to keep enemy ships out or collect tolls?
 * Comment: If the hook isn't juicy enough (I think most people are unaware that booms exist at all so will find it juicy) I can go for something else, possibly about the breaking of the chain at Vigo Bay.
 * Reviewed: Edward of Norfolk

Created/expanded by Oreo Priest (talk). Self nominated at 05:02, 21 October 2013 (UTC).


 * Symbol confirmed.svg This article is new enough and long enough. The image is in the public domain. The hook is interesting and well sourced. No copyvios found. Cwmhiraeth (talk) 06:02, 22 October 2013 (UTC)