Mention of the retired Coaster on the Thames brought memories that I had long
forgotten.
There used to be something very similar on the Brayford in Lincoln. There
was an old broadbeam barge that was modified so that the bows could hinge open,
a boat would float in then the bows would be shut and the water pumped out. So
far as I remember this disappeared in the mid 1960's when the Brayford was
'cleaned up' by local volunteers.
Steve
Adrian Stott <[EMAIL PROTECTED]> wrote:
"sean neill"
wrote:
>> In Lockport NY they have Drydocks that water is pumped out of to do
>> repairs to barges...Do You use boat lifts or Drydocks on your canals
>> and do you have photos of Drydocks?
>>
>Most yards use dry-docks as working (and modern) boats are usually
>flat-bottomed.
Another variant is the floating dry dock. Floatation tanks in the
dock are allowed fill, and the dock sinks until the boat to be docked
can float over the supports in the dock. Then the gate is closed and
the floatation tanks are pumped out. The water in the dock itself
drains out by gravity as the dock rises.
There is one on in the Thames in London (Islington), made out of a
retired coaster. When the tanks were fully pumped out, I had a fine
view from my barge, the bottom of which was about 1.5 m above the
surface of the river.
>Boats were traditionally built on, and could be repaired on, side-slips.
A marine railway, although in theory any set of rails running into the
water, with a car which the boat can float over after which the car
and boat are pulled up the track, IMHO the term is usually limited to
those where the boat leaves the water end first. Those where the boat
leaves side first are, I think, always called "slips".
Not to be confused with "portage railway", e.g. at Big Chute in
Ontario, which is a type of lift between two bodies of water (almost
always at different levels) to carry boats. Somes called a "dry
cradle lift".
I think it is still the case that the facility on which a ship is
built for launching in adjacent water is also called a slip,
irrespective of the orientation of the ship to the water. e.g. "The
Titanic moved down the slip into the sea". However, I think it would
not have been possible to pull the Titanic back up the slip, even
before it sank.
Adrian
Adrian Stott
07956-299966
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