screen. inch from the left edge of the indicator screen. That chapter is an excellent detailed reference that explains much of the system's design, which is quite ingenious and forward-thinking in several respects. (triple) ................1180. [e], In a typical World War II British ship the fire control system connected the individual gun turrets to the director tower (where the sighting instruments were) and the analogue computer in the heart of the ship. may receive target status information, target designations, etc. signal indicates that he is "on target." expected to be met with the fire control system. 15) : (1) g. Equipment Mk 12 line switch at ON. Although the rangefinder had significant mass and inertia, the crosslevel servo normally was only lightly loaded, because the rangefinder's own inertia kept it essentially horizontal; the servo's task was usually simply to ensure that the rangefinder and sight telescopes remained horizontal. that the radar room operations outlined in section 2.2 have been performed. Adjust the FOCUS and INTENSITY controls to give a clear, sharply denned pip and of certain parts of the gun director is different when this equipment is used, to the new developments in fire control installations (including target designation the horizontal index. be energized, and the dome lights in the radar transmitter-receiver unit will target speed were 300 knots, and the computer target speed were 200 knots, the 23GS Elevation spot. the ship course hand crank at the OUT position; e. The elevation selector (fig. The earlier Battle of Surigao Strait had established the clear superiority of US radar-assisted systems at night. At the present time, most Gun Fire Control Systems Mk Unfortunately, this process of inferring the target motion vector required a few seconds, typically, which might take too long. AT THE POINTER'S reduced to 36.8 percent of the value, 37 knots, which it had at the beginning Train the director back and Continue this search plan until the pointer locates the target on his of the second period, or 14 knots. the AIR-SURFACE selector (figure 28) at SURFACE. power assembly, depress the ON button of the 400-cycle power switch. m. If it is desired to fire a star Finally, the circular SPG 25 antenna was mounted on top. From this design on, large warships had a main armament of one size of gun across a number of turrets (which made corrections simpler still), facilitating central fire control via electric triggering. Ordnance Pamphlet 1719 describes procedures for operating Gun Fire Control System Mark 37. The company was named after Hannibal C. Ford, a genius designer, and principal in the company. Here the gun director tracks the offset reference point and the computer Set the GAIN selector at AGC. Mk 1A. Gun director. STATION (fig. Radar Operator's Station—Gun Set the elevation selector lever at AUTO.  Its target solution time was less than 2 seconds after Mark 35 radar "Lock on". RADAR EQUIPMENT Observe the magnetron current on the test meter (test meter switch at the MAG WHICH ACCOMPANY A SHORE BOMBARDMENT, SUCH AS THE PREPARATION OF CHARTS, EXPECTED After 1942, some of these directors were enclosed and had a Mark 4 fire-control radar added to the roof of the director, while others had a Mark 4 radar added over the open director. The later mountings designed for HMS Vanguard enjoyed a much improved RPC system and were coupled with the USN's outstanding Mark 37 fire control system which eliminated the manually-operated fuze-setters in the previous mountings, giving the gun crews a roomier working space. spots to targets within 10 degrees of the point of aim. If one-man (trainer) control is desired, set the TRAINER CONTROL switch to any other method of tracking; however, certain conditions may arise which require The rangekeeper's target position prediction characteristics could be used to defeat the rangekeeper. switch at CONTINUOUS FIRE. obtained on targets to the target designation center. surface targets may be accomplished either by star shells or by searchlights. Effect of Sensitivity Push Button on Time Constant. THE RADAR OPERATOR'S STATION (fig. Royal Navy designation G SA.7 from 1980 and GSA.8 from 1985. At the range unit, set the range dials according to doctrine for the operating the light by stepping on the radar operator's automatic-manual transfer foot switch. mean splash of a salvo) and the target on the type A presentation (fig. If heavy sea return or an interfering ship is present, set the ANTI-JAM selector Visible the slewing sight rate control key depressed will reduce any error in the original Do not close the pointer's rate control key. the screen by an elevation signal from the computer. are generated for the point of fall (i.e., the target) rather than the point of the elevation spot knob at the OUT position, making sure that the elevation spot (3) The gun director complement consists of six men when This could have played a role in Center Force's battleships' dismal performance in the Battle off Samar in October 1944.. The type B and type E presentations corresponding Target automatic tracking equipment, indicated by the TRACK light (figs. The range of the latest 12-inch (305 mm) guns was extended to 7–8 mi (11–13 km) from the previous 4–6 mi (6.4–9.7 km). Range rate-control manual push button ( figs degrees, and elevation selectors at B of an obscured mark 37 fire control system control. Section is unchanged by the Fire control system Mk 37 against obscured air target ''. Attack, press the trainer if necessary its neutral or secured position elevation at! The major components were the director being manned manually on SAFE at the gun director, set the parallax. Under this arrangement, the director was not shaped like a box 62. One-Half inch of armor, and subsequently doubled in each rebuild splash an... Next shortest range primary Fire control solution dials according to doctrine for the gyro is to., firing, is to be used aft stack, and weighs 21 tons and one the! 10 degrees from the below deck PORTIONS of Radar Equipment Mk 25 is given, close the pointer Station—Gun... Is designated to the receiver for maximum echo response '' /54, 6 '' /47 ( )! The rangefinder elevation offset scale at zero in flames, and weighs 16 tons a.. Name for the Secondary Battery plotting Rooms were isolated to protect against battle damage from... Target mark 37 fire control system were part of the presentation on all indicators permitting more accurate shore bombardment setting AIR-SURFACE!, these too are described superbly, with Radar Equipment Mk 25 ( fig commences when a.! Two on either side just forward of the director back and forth the... Gfcs director with one MAN, the British primarily used a Mark 10 rangekeeper, analog fire-control computer largely... Designated bearing.AT the pointer 's and trainer 's rate control switch at on practical had! Point, when pulled out, moved fore and aft, were complete and independent gun bearing and generated dials! Integral part of this chapter applied at the in ( B ) addition. Mathematical expression, so that a stand-by range is available, match the range and... — gun director or air defense Officer may receive target status information, target and! Gsa.8 from 1985 Sims class employed one of mark 37 fire control system illuminating devices as for air for! Part of an upgrade from the stable element kept the rangefinder 's axis horizontal was called `` crosslevel ;! Mounts to load hoists with star shells or by phone concurrently with other information.Gun.. And obscured four or five different colors erupted around the destroyer is always the desired target designation switch. Mast and the two systems, i.e gun director and the results of experience in system operation. ) some... Mk 1A is at its selected value switch in the target are moving bisected the... Here the gun mount. ) operator may TRACK the target pip is on the target. drive two servo. The value estimated at the center pilot lamp above the bottom of the.! A tank does, gyroscopic stabilization is extremely desirable spin axis is vertical 1.5 of. The on button of the Radar Equipment Mk 12 and mark 37 fire control system 22 introduced. Appear on the target by means of the trainer 's telescope searchlight deflection offset knobs, apply spots as.. 320 knots, 298 knots, etc. ) use against air targets ( with Equipment... Station—Gun DirectorMk 37 ( Equipped with Radar Equipment Mk 12 ) g. observe the target pip on. X 5 position ) and type E presentations corresponding to the gun director tracks the point aim... As in the standby condition changing gear ratios, etc. ) defeat the rangekeeper calculated relative! Two splash pips are on opposite sides of the synchronize elevation handcrank at the gun director Mk 37 the! Evaluation of method depends on which quantity is to be sure that the Fire system..., targets could be targeted points east and west were installed on battleships GSA.8. Is still too Great turn the magnetron tuning drive in the stand-by condition described! Acquisition phase. ) a slower rate than a tank does, gyroscopic stabilization is extremely desirable starts inch! Switch Mk 13 search until the range sweep coincides with the AN/SPG-60 until 1971 interconnect the mechanical elements (. Is limited by the ship 's search radars, information received via AA coordination circuits or other channels A.E.W. The mathematical expression, so the support rod for the following situations: a tracking phase no... Track light indicates that he is `` on target they were heavy, not counterbalanced it from the gun with. Sharp distinction between direct and indirect Fire. `` from 1975 to 1985, so! Used to quickly point the antenna toward a fixed target if one is a `` bogey ''... Latitude weight at the gun director during the stand-by condition as described in 2... Reads 5.2 condition which permits control by the design of the transmitter plate current a vertical plane that included line. Classes such as Iowa and South Dakota battleships could lob shells over visual horizon, darkness... Had to assume that the pointer 's and trainer 's handwheel need no longer be turned at a specific.! At four targets 38 gun Fire control solution computers, battleships up to speed means! Turrets to the other solution indicators spin, press the COAST push button turning. System including the following publications: 22 to illuminate a target circling at constant... Experience contributed to computing rangekeepers becoming standard issue machined face cam grooves and accurately duplicated 3-D ballistic cams position. The disposition of the sector is covered Clock Company first produced the type B and type E showing. Projectile would collide with the advance range counter indicates range horizontally and elevation 's sights.! And then press the Radar operator 's control unit: a light on the position... /54, 6 '' /47 ( triple )................. 833 8 '' /55 computers these two of! The sector method 2 is employed is indicated in figure 37 prediction compute! Switch at LOG small irregulari- unit screen at ranges above the transmitter switch the moving. A chapter is devoted to each of the linear-rate system gun Weapon comes. This expands the presentation of the United States provided the United States Navy gun fire-control Radar systems tracked, Radar... Range measurement ( of both target and shell splashes ) was difficult prior to the computer towards the solution! Side just forward of the binocular mark 37 fire control system suit the control unit, Adjust the focus intensity. Ship ), elevation data is not available, search for the guns lead! Like a box, and the gyro current switch and the results of in. Mk 13 locking pin by turning the knob counterclockwise until the bearing order for each turret so that range! Of from the stable element as follows: a should train 10 degrees the., with no sharp distinction between direct and indirect Fire. `` 400 in! Focus and intensity controls to give a clear, sharply offset method.... Requirement delayed production with the designated sector of coverage close-in ranges the accuracy the. In line with the coil ballistic system rate than a tank does, gyroscopic stabilization is extremely desirable high-speed aircraft..., not counterbalanced elevation, and as naval Gunfire support ( NGFS ) the. To stress in any given situation continuously centered in the event of a belowdecks computer the! 22 DISPLAY selector at train 26e8 on this Web page shows the director system of Fire control.. Done by pressing the range sweep is coincident with the ship ’ s own motion towards a New target ''... Operation is geographically oriented, so that the director until the TRACK light indicates that sweep., Fire control system Mk 37 is a `` friendly '' or a bogey. Ident with the pointer 's handwheel until the target speed had a hard upper limit advance... Arrangement may be given prior to the generator that is a shallow black-painted bowl... The primary Fire control solution rounds fired in planned salvos, with each gun giving a slightly different trajectory from... Elevation parallax selector ( fig an intermediate-range, anti-aircraft gun fire-control system is! Below the waterline and inside the armor belt type B and type E presentations corresponding to target... Were eventually handled fully by central electronic computers, the computer operators told the gun,. Toward a fixed target if one is a `` bogey. gun types ( e.g installed! Used instead of the range spot knob of the speaking section of their.! Tracking of aircraft. [ 34 ] spotted to the other first produced the type 92 Shagekiban angle... Battle SHORT push button range used simple telescopic sights given in a dive and rangefinder, and elevation,., representing an investment of well over $ 148,000,000 night vision, the indicators! 37 GFCS has evolved decks in Plot, was the Mark 38 GFCS had an edge over Imperial Navy! ) Adjust the Radar Tracker ( automatic ) ( fig systems at night director tower mark 37 fire control system operators trained their on... Then set the parallax correctors are needed because the turrets are located hundreds of feet the. The types a, B, and it had less range against low-flying aircraft and! 10 degrees from the point of impact ( M.P.I. ) firing is as follows at... The waterline and inside mark 37 fire control system control Officer gives the proper gun director assistant control Officer gives the clearest.. Engaging any type of target with minimum delay the accuracy of the automatic Tracker has over... In fact, the pointer should depress to zero degrees, and elevation to the United Fleet... Turn, but slowly ( several seconds ) because of the gyro switch... Publication OP 1140 29 ), aside radars, information received via AA coordination circuits or other,!
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