>>418
俺にレスするな統失

Ladder Salvoの距離を固定するのがRocking ladderなんだよ。
ロッキングチェアーとかいってる馬鹿はお帰りくださいｗ

Ladder Salvo - Also called "Ranging Salvo." When a ship is firing at a target and isn't quite sure of the range, what the gunnery officer will often do is elevate each gun or group of guns slightly differently.
This makes each shell land a little farther along than the last one. By watching to see which shell hit or landed closest to the target,
the range can be determined more accurately. During the early part of World War II, the procedure used by the new US battleships was to fire all nine guns as a ranging salvo,
a typical pattern being one group (three guns from one turret) at 200 yards (180 m) up from the initial range estimate, one group at 200 yards (180 m) down and one group at 400 yards (370 m) down.
There was also a timing difference between groups to avoid confusion between the shell splashes. Once a bracket had been obtained, thus indicating the correct range, the ship would then switch over to rapid fire, with the guns firing as they were ready.