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2 position bars for setting the initial and final stations; A speed bar, on which the speed of the ship (relative to the flagship) was set, and which was clamped at one end into the diameter grove by the speed ratio clamp; A guide bar; A circular disc; To use the instrument, the course of the flagship was first set on the guide bar.
Figure 1: Rangekeeper Coordinate System. The coordinate system has the target as its origin. The y axis value range to the target. US Navy rangekeepers during World War II used a moving coordinate system based on the line of sight (LOS) between the ship firing its gun (known as the "own ship") and the target (known as the "target").
The position of the wheel could be moved in and out along a radius of the disc, so that the wheel turned at different speeds (faster the further out). Operating errors would occur from adjusting the wheel, as the wheel tended to slide as it was dragged across the face of the spinning disc as it was adjusted.
The battleship USS North Carolina during a 1945 test was able to maintain an accurate firing solution [15] on a target during a series of high-speed turns. [16] It is a major advantage for a warship to be able to maneuver while engaging a target.
This sends an electrical signal to the EOT placed in the engine room whose pointer acquires a position according to the signal given from the bridge. An audible alarm sounds at both ends. Accordingly, the watch-keeping engineer acknowledges the order by moving the handle of the engine room EOT to the required position and takes necessary action.
Donald Trump mocked Canadian Prime Minister Justin Trudeau after his top minister’s surprise resignation following a clash on how to handle the president-elect’s looming tariffs.
Mark 1A Computer Mk 37 Director above the bridge of destroyer USS Cassin Young with AN/SPG-25 radar antenna. The Mark 1, and later the Mark 1A, Fire Control Computer was a component of the Mark 37 Gun Fire Control System deployed by the United States Navy during World War II and up to 1991 and possibly later.
Enjoy a classic game of Hearts and watch out for the Queen of Spades!