Post by Razzbar
What is that thing? It kinda looks like a clock, but if you
look closely, it's divided by 10 markings. You see it on
some pictures of the USS Arizona, looking astern from the
fore part of the ship, up on a mast or superstructure. I
was browsing an excellent recent book about the ship, and
none of the diagrams explained what it was. I've never
seen such a device on any other ship.
Know what I'm talking about?
Range clock. Adopted by the RN Grand Fleet after Jutland, introduced into
US ships when they became a Grand Fleet battle squadron in '17 or '18.
It repeats the range set into the ship's gunnery director, while bearing
marks painted in the turrets show the bearing of the target. This allowed
ships which couldn't see the target (whether for fog, mist, smoke or
whatever) to dial the settings (plus the offset for position from the ship
they took the data from) into their gunnery control systems and hammer
Andy Breen ~ Interplanetary Scintillation Research Group
"Who dies with the most toys wins" (Gary Barnes)