Port Security Barriers

Prompted by a recent incident in the waters off Gibraltar, between Royal Navy and police on one side and the Spanish Guardia Civil on the other, ThinkDefence has posted advertising and videos of a number of barrier systems. I’ve seen one of these deployed around aircraft carriers in San Diego.  All are claimed to be effective against at least small boats, some against swimmers or larger vessels. Much of the interest in these systems goes back to attack on the USS Cole in Yeman.