EMERGENCIES 327
the purchases at the same time until the pintles are clear of the gudgeons.
Remove the jack. Guy the bottom of the rudder clear and lower away.
16. How would you manage if you had to do the same job with the
ship afloat?
Rig the two three-fold purchases and secure them to the rudder
in the manner just described. Disconnect the rudder coupling and
locking pintle.
Raise the quadrant and rudder stock high enough to get the lower
part of the rudder clear. This could be done with a jack on deck
underneath the quadrant or by means of wedges between deck and
quadrant.
Heave away on both tackles until the pintles are clear of the gudgeons,
The rudder will then be free of the rudder post.
Slack away on one tackle until the rudder is hanging by the other.
Heave it up and land it on a barge. If alongside a wharf
or in dock I could dispense with the barge by getting a crane on to the
rudder and lifting it ashore direct from my tackle.
17. How would you unship an old-fashioned rudder? The spinclle and
stock are in one piece.
When dry docking the ship inform the dockmaster that I want her
settled down on the blocks with her rudder over the rudder pit in the
bottom of the dock. This to enable me to lower the rudder down
far enough to get the head out of the rudder trunk.
Clear away the rudder head by removing the key and taking of!
the crosshead and quadrant. Clear out the stuffing box. Remove
the collar plate from around the bottom of the rudder trunk, also the
locking plate from the rudder. Tap a hole 1 inch in diameter vertically
in the rudder head. Screw into it a stout eye-bolt for lifting purposes.
Rig a pair of short stout sheerlegs over the rudder head, seeing that
the deck is shored up underneath them. Hang a good threefold purchase
from them. Use iron blocks and a wire fall. The lower block must be
small enough to go down through the rudder trunk. Shackle it on to
the eye-bolt which you have screwed into the rudder head. Take the
weight of the rudder in the purchase, a jack under the bottom of the
rudder will help to lift it enough to get the pintles out clear of the
gudgeons. Make the fall of the tackle well fast and remove the jack.
Open up the pit in the dry dock underneath the rudder post and lower
the rudder down into it. Remove with another tackle or tlie dock crane*