Abstract: Wireline apparatus for subsea use in which a wireline is fed from a winch mechanism disposed within a housing, through the interior of the housing to a feed tube which engages on a wellhead assembly so that the interior of the feed tube communicates with a drill hole, the housing being in sealing engagement with the feed tube thereby to isolate the winch mechanism and wireline from the ambient subsea environment. The housing and feed tube together preferably form an inverted U and the winch mechanism is disposed with the free end of one arm of the U.