Post by Alan MinyardI was in the USN from 1957 to 1963, there were no such things as doors,
How things have changed. Ships now have WTDs (water tight doors) and
walls (inside certain tanks).
On "walls" what do people think is the correct term for longitudinal "walls"
inside the hull? ie bulkheads are athwartships, so what do you call
longitudinal "walls"? Superstructure "walls" are "screens" AFAIK when they
are the "outside walls" but internal partitions of superstructure are not
screens and they cannot be bulkheads either! So what are they? (can't use
"dividers" since these are those two- legged hinged thingies used for
measuring distances on a chart)
I suspect USN ships always had doors same as other ships, some watertight,
and somehow it became fashionable to call them hatches, maybe from having a
large civvy intake in WW2 or somesuch origin. There are also those big
spring- loaded sliding doors between the boiler room and the engine room in
some ships.
On tanks, the sides of double bottom tanks are the longitudinals and
transverse frames of full depth between the outer and inner bottoms. Where
a large tank that extends athwartships is not kept either empty or pressed
up to prevent free surface effect, there are often longitudinal partitions
(sometimes called baffle-plates) Are these now called "walls" in the USN?
1885 marine dictionary on parts of iron ship mentions, among other things,
under tanks:
centre plate, end plate, hatch of, manhole in , manhole cover of, margin
plate, top of
On hatch beams being removable steel beams fitted athwart a hatch to
strengthen it and to support the hatch boards (1951 Seamanship Manual), the
1885 marine dictionary has another definition where you must be careful not
to call a hatchway a hatch to understand which beams you are referring to.
Hatchway beam--in the deck of a wooden ship a hatchway lies between two
full beams before and abaft it, called hatchway beams, same as the beams
before and abaft a "mast hole" are the "mast-beams". Where the hatchway is
, on either side, "half-beams" go from the hatchway "coming" (or carling)
out to the frames. (A mast hole is formed by fore and aft running "mast
carlings" either side of the mast between the mast beams with chocks as
fillers, the deck planks over all this near the mast hole are called "mast
partners"
The built -up verticals around a hatchway on deck to act as breakwaters and
to support the hatch (cover) are called "coming" or "carling" on the two
sides running fore and aft, but the athwartships pieces are called a
"headledge". Hatch -batten cleats are fitted on the outside of both comings
and headledges. Notches are made in the inside top of the comings to take
the athwartship " hatch beams".
This is vital stuff! I mean it's the straight skinny, hot poop, and it's
not duff gen.
Regards,
Barry