H20 standard SOLAS approved model (YELLOW) CE approved 6-150 person liferaft (commercial)
Inside the Hammar H20, a pin under tension sits in a notch of a spring-loaded knife. The pin is attached to the center of a flexible membrane. At the intended depth, water acts on the membrane pushing it inwards and out of the notch. When the pin is fully out of the notch, the blade can instantly spring forward, cutting through the strong rope and releasing the lashing.
The Weak Link™ holds the painter line assuring the necessary pull to inflate the raft as the buoyancy of the liferaft container floats towards the surface. The increased buoyancy of the inflated liferaft will cause the Weak Link™ to break, and the raft can surface.
The Hammar H20 is designed to cut through the White Strong Rope but may, in some applications, also cut the unshielded electrical cable.