Originally posted by Dave56:
I don't know how they do it these days but in the 70's and 80's they used wood supports placed in strategic positions under the keel. They'd position the ship in a pinpoint fashion and then pump the water out of the drydock.
it's still done that way today.
are a couple of pictures of "QM2" in dry-dock at Hamburg's Blohm + Voss shipyard last November. They were taken by fellow CC moderator Stephan Giesen who was allowed to take pictures of the ship from within the dock. Simply amazing, even though, sadly, the weather was terrible.