There is disclosed, apparatus for securing a mooring line (5) of a vessel, the mooring line having an eye (6), said apparatus comprising a hook (10) around which the eye (6) of the mooring line (5) can be secured, the hook (10) having a pair of hook members (11a, 11b) defining a gap therebetween, and guide means (15, 17, 9) configured to guide a heaving line attached to said eye along a path which passes through said gap whereby when said heaving line heaves the eye past the hook, the eye locates over the hook.