(Certified Scuba Instructor at Scuba.com)
Hello Bruno, yes the is a very good BCD for diving.
BLACKWING - Back Wing Style for Men Back wing or back floatation BCs offer streamlined construction with all the flotation at the back of the diver, leaving the front area low profile and clear for the attachment of accessory items
INTEGRATED WEIGHT SYSTEM All BARE BCs are equipped with an Integrated Weight System to allow convenient management and emergency release of ballast weights. There are three sets of pockets on the BCs where weights can be placed, but only one set with quick release capability. Main Weight System – There are two releasable main weight pockets. These pockets hold between 10-15 pounds (4.54 – 6.8 Kg) each, depending on size and model of BC chosen. (see details pages for specific amounts) Each pocket has a weight pouch with a large flap secured with Hook & Loop fasteners. Remove the weight pouch from the pocket with a sharp tug on the grey handle. Undo the pocket flap and insert the desired amount of bagged lead shot or solid weights. Environmental note – If you choose to use lead shot, please make sure the shot pack is sealed and waterproof to avoid the possibility of lead-tainted liquid leaking into the water. Once the weight pouches are loaded, secure the flap by pressing firmly on the Hook & Loop fasteners. The loaded weight pouches may be inserted into the pockets after donning the assembled BC and cylinder set-up. Slide the weight pouch into the pocket and connect the male side of the Side Release Quick-Disconnect buckle on the weight pouch with the female side on the BC pocket. The weight pouch is now secured in the pocket until you choose to disengage the buckle with another sharp tug on the grey handle. 13 In an emergency weight-ditching situation, grasp the grey handle and pull sharply forward. Retain control of the weight pouch in your hand until you can see it is clear to drop without danger of becoming entangled in any other gear you may be wearing. To ease normal water exits onto a boat or dock ladder, the weight pouches can be removed and passed to an assistant to lighten your load when climbing out of the water. Rear Tank Ballast Pockets – All BARE BCs come equipped with two Tank Ballast Pockets. The pockets are built in to the BLACKJACK on each side of the tank backpack. The pockets are separate on the BLACKWING, CURVE, & VOODOO models. They are designed to be installed on the cylinder strap if desired. The purpose of the ballast pockets is to counteract the positive buoyancy of an empty aluminum cylinder. Some divers find this buoyancy – especially when using a back wing air cell – tends to tip them forward. The ballast pockets hold up to 5 lbs/2.27 Kg of weight per side. Supplementary Side Pockets – Should you need more weight than the Main Releasable Weight System and the Rear Tank Ballast Pockets combined, there are two Supplementary Side Pockets, one on each side of the front of the BC. These pockets hold up to an additional 10 lbs/ 4.54 Kg each.