This “logbook” is dedicated to the Gowind OPV L’Adroit, the first offshore patrol vessel ever built by DCNS, will be updated every week with expert contributions or short features on key moments of L’Adroit’s lifecycle. At the very peak of naval defense innovation, the Gowind OPV provides a high level response to the new challenges met by navies around the world.
L’Adroit’s RHIB ramps get a “10 out of 10”
Take it from the commandos themselves: when undergoing missions against piracy or illegal trafficking, it should take a military ship no more than 5 minutes to launch and recover two fast embarcations. This is why, when designing the L’Adroit, DCNS put innovation at the service of speed as well as of an enhanced safety.
Yannick Bian, naval architect for the Gowind range, ensured that an innovative solution was provided to respond to the challenge. As a result, the rear of the OVP now integrates a double ramp system allowing for the launch of two RHIBs (Rigid-Hull Inflatable Boats) in a record time – ie. of approximately 5 mn.
Explains Yannick Bian: « Drawing on systems used successfully by offshore fishing boats like tuna purse seiners, the double ramp system is designed to perform in sea conditions up to force 5, night and day ».
This innovative launch and recovery system was co-developped by DCNS and Bopp, a Britanny-bound company, with as a result, two patents already registered.
To allow for a maximum control throughout the launch of the embarcations, each ramp is equipped with a horizontal post. Thanks to this system, the speed of the boats remains under control whilst the safety of passengers is enhanced.
When being recovered, the embarcations are first hooked to the L’Adroit before being pulled safely onto the ship. This operation is undertaken whilst the engines of the RHIB are off.
In addition, it does not require the captain’s involvement, which is a premiere; however the L’Adroit’s captain can control every step from the bridge thanks to a full visibility over both ramps.
These systems have begun to prove themselves in operations. The executive officer of crew A explained to us that in reality the time taken to launch the aft RHIB in calm conditions is closer to 2 minutes, including mustering the personnel, switching on the system, opening the doors and launching. Launching itself takes only 30 seconds. About thirty seconds must be allowed for recovery, once the cable has been hooked up. It looks like the wager has been won.
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