Report Issued by Colonel C. M. Seaman with Attached Note from Roger T. Sermon [pages 1 and 2 missing from original]

PROCEDURE: The Director indicates to the Officer conducting the fire the location of the battery on the "PLAN DIRECTEUR" and gives him the coordinates OF the target together with the meteorological data. as shown for the problem. 776 The officer then computes the firing data and makres all the preparations for opening fire. When ready to fire he directs his assistant to put out the panel *READY TO FIRE". The wireless sending officer gives the signal to *FIRE" as from an cirplane, whereupon the receiving officer puts out the panel "BATTERY has FIRED". The Director then assumes a. line of fire and a center of impact, not too far removed from the target, which is plotted upon the paper ruled to a scale of 1 draws a counter from the hundred counters provided, and plots, 5000 en the paper the corresponding shot or shots. (It is recommended that the exercise conmence by using only one gun and that more than one be not used until officers have demonstrated the necessary skill in the manipulation of fire.) The location of the shot with respect to the target, whether short, over, right or left, with the approximate distance, if desired, is then signalled back by buzzer and communicated to the officer conducting fire who makes the necessary corrections for the next shot. This procedure is then continued until a bracket is found and improvement fire has determined a satisfactory center of impact. If the center of impact is not on or near the target, the problem will be continued until it has been placed thereon with reasonable accuracy. After assuming the center of impact and the line of fire, the director will move the probability rectangle so that the displacement of the center of the rectangle in range and direction will be accurately in accordance with the cirrections in range and direction made by the officer conducting fire, and after each shot will draw a counter and plot the corresponding shot indicated on the rectangle, in this way providing for the deviation in range and direction of the shot from the center of impact. After each problem a short critique should be held to indicate errors of method and the correction thereof. Proficiency in solving such problems is indicated by the time con- sumed in placing the center of impact on the target and in the number of shots necessary to accomplish this purpose. If a buzzer is not available for sending wireless signals, telephone messages from a terrestrial observation station may be assuned, in which case problems can be made in unilateral and bilateral observation. In using terrestrial observation the distance of the point of fall of the shot from the target will be given. Throughout the problem, the officer conducting fire will be required to limit his commands to those presented in the drill regulations and to give them in the proper order and sequence. By Command of Brigadier General AULTMAN; NATIONAL C. M. SEAMAN, SCUIVES AND Colonel, C.A. U.S.A. SERVICE" Chief of Staff, Arty. Headquarters 129th F.A. January 14, 1919. Br. Commanders will organize asohool of indoor firing exercises as outlined in this memorandum. School will be conducted 4 nights a week, Monday, Tuesday, Thursday and Friday. for one hour each night. By order of Colonel Klemm, R.T Sermon, Capt 129th'F.A. Adjutant .