Lifeboat suspension systems

A suspension system for a lifeboat comprises a pair of hook assemblies (22) each adapted for connection at spaced locations to a lifeboat and for coupling to the lifting links (14) of a pair of suspension cables. Each hook assembly has a hook member (34) pivoted for movement between a closed setting and an open setting and is of a load over centre design. A single control mechanism (23) is provided for both hook assemblies and is connected thereto by way of a pair of flexible cables (24,25). A primary release mechanism (26,67,68,61) is arranged to pull the cables and so move the hook members to their open settings when the lifeboat is floating. Under emergency conditions when the hook assemblies are heavily loaded, an emergency release mechanism (28,75,72,57) is arranged to move the hook members (34) to their open settings notwithstanding the relatively large load thereon. The emergency release mechanism has a significantly greater mechanical advantage as compared to the primary release mechanism.