Dunlop have been
building boat barriers for in excess of 10 years. The product
makes use of composite technologies originaly conceived
at Cambridge Universirty, England.
The November 2000 attack
on the USS Cole by a suicide bomber in the Yemen led to
a global review of port side security.
The Dunlop boat barriers
were physically tested as an anti-terrorist device by the
US Navy in San Diego Harbour in May 2001. The units were
successful against the threat for which they had been designed.
However, it was thought prudent to enhance the design, making
the units larger and more robust to combat a broader range
of threats. Dunlop anti-terrorist boat barrier systems are
currently being installed around the world. The Dunlop inflatable
anti-terrorist boat barrier is a cost effective and highly
visual deterrent. Its design is such that it can be adapted
to any port situations, naval, or commercial and also for
the protection of land based assets which are vulnerable
to sea attack, for example coastal nuclear power plants.
The unit once installed
requires little maintenance and can be expected to have
a life of 10 years or more. A barrier system currently in
service was inspected on its 10th anniversary and certified
as fully functional for many more years.
Linking inflated units together.
The units currently being
manufactured are of 25m length and 2.4m diameter. They operate
at around 70mbar (1Psi) and are shackled together with buoys
and anchor systems at pre-determined intervals. The gap
between the buoys is dependant upon geography, climate and
tides etc. Being low pressure, the units' first function
if attacked by a boat is to absorb the energy, an internal
steel cable then comes into play causing the energy, now
multiplied to return to the boat inflicting major damage.
All ancillary metal fitments
are designed to operate with a long life in a marine environment.
Units are delivered to the site deflated in crates, unpacked
with a fork lift truck, inflated to 70mbar (1Psi) and subjected
to a final inspection before being launched.
Dunlop can offer a full
package including site survey, design of system with moorings
and buoys, together with full installation and training.
A series of units also operate as a gate where vessels need
access. In addition to the barrier, a range of sonar, radar
and camera equipment can be installed to provide comprehensive
Dunlop Boat Barrier deployed,
protecting naval assets.
Navy ribs manoeuvring inflated
into position for deployment.
Linkages of 5 units are installed
pre-determined anchored bays.