It is a disputable question whether such a boat should be a lifeboat.
The air-tight compartments, usually made of copper, certainly add to
her weight, and, some say, make her less stiff. On the other hand, it
is pleasant to feel that your boat is unsinkable, and that if you
knock a hole through her bottom with a rock, or ship an unlucky sea,
she will not go down. But if you decide, as I should do, on a
lifeboat, be sure that she really is one, and that her air-tight
compartments are large enough to float her with ballast and crew on
board. A 25-ft. cutter, such as is built by White of Cowes, will carry
more than half a ton of ballast and half a dozen people quite
comfortably when she is full of water. But I have seen small
steam-launches, nominally lifeboats, that would undoubtedly, with
their engines and boilers on board, sink like stones if they were
filled with water.
Wooden air-tight compartments are lighter than copper tanks, but they
are apt to warp and become leaky. Twenty-two years ago, in New
Zealand, I had a lifeboat sailing-cutter sent out to me by long sea
that I had had built for me in England. As soon as she arrived I took
a friend out for a sail on a rough day and filled her with water, just
to show him her marvellous properties. The result was ignominious. The
water-tight (!) compartments filled, and we drifted helplessly home,
thanking the Fates that we had nothing but water ballast on board.
The shape of the stern is another point on which opinions may
reasonably differ. There is much to be said in favour of a boat being
sharp at both ends. A sharp stern is undoubtedly safer when running
through broken water or before a heavy sea, and when a boat 'squats'
in running before a strong wind it does not drag dead water behind it,
and makes a cleaner wake. But unless increased length can be given to
the boat it diminishes stiffness. The square-sterned boat carries her
bearings farther aft, and so, if both are of the same length, the
square-sterned boat, other things being equal, will be the stiffest of
the two. But if you decide for a square stern let the boat have a fine
run aft, and let the square surface of the stern be small and well up
out of the water.
Any sort of a counter is an abomination, dangerous to a boat in a
sea-way.
She should have a good side; that is, a high side above water. It adds
to her stability, as well as making her much drier. If her side is
rather low, washboards fixed along the top of the gunwale will be
found advantageous in rough weather. She should be higher out of water
at both ends than amidships, and the line of her rail should describe
a graceful curve from bow to stern. A boat that looks quite level from
end to end is generally a poor sea-boat, and, if her bottom
corresponds with her top, a bad steerer besides.
Public-domain text, read in full here on John Shaqi.
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