Marine barrier systems

A marine barrier comprising:

• two substantially parallel elongate buoyant members spaced apart from each other;
• an elongate net support member spaced from the buoyant members, disposed between the two buoyant members and above the buoyant members when the buoyant members are floating in a body of water;
• a plurality of substantially rigid first stanchions extending between the two buoyant members to maintain the spacing between the buoyant members;
• a plurality of substantially rigid second stanchions, each extending between one of the buoyant members and the net support member to maintain the spacing between the buoyant members and the net support member;
• and
• an impact net attached to the net support member and a first one of the buoyant members, or to the net support member and the plurality of first stanchions, such that when the buoyant members are floating in the body of water and a moving vessel impacts the impact net, the impact net deflects to transfer a force of the impact to one or more of the net support member, the first stanchions, the second stanchions, and the buoyant members, and the buoyant members in turn engage the water to transfer the force of the impact to the water and arrest the motion of the vessel;
• wherein one of the plurality of first stanchions, one of the plurality of second stanchions extending between the first one of the buoyant members and the net support member, and another one of the plurality of second stanchions extending between a second one of the buoyant members and the net support member are attached to each other to form a truss, the truss having fittings joining adjacent stanchions of the truss to each other, the truss configured to connect the first and second buoyant members and the net support member;
• wherein the barrier is attachable to a second barrier substantially identical to the barrier by flexibly attaching a first end of the barrier to a corresponding first end of the second barrier;
• wherein the barrier comprises an elastic hinge joint and a hinge adapter at the barrier first end, the hinge adapter rigidly attachable to the net support member and the buoyant members, and also attachable to the elastic hinge joint;
• wherein the elastic hinge joint is further attachable to the corresponding hinge adapter of the second barrier.