Ordnance maintenance : plotting boards for field artillery Page: 1
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TM 9-1569
1-3TECHNICAL MANUAL] WAR DEPARTMENT,
No. 9-1569 ( WASHINGTON, May 21, 1942.
ORDNANCE MAINTENANCE
PLOTTING BOARDS FOR FIELD ARTILLERY
Paragraphs
SECTION I. Introduction 1-----------------------------------
II. Board, plotting, sound ranging, M------------ 2-4
III. Corrector, wind, sound ranging, Ml ___________ 5-'7
IV. Board, plotting, M5_---------------------------8-10
V. Maintenance and repair---------------------- 11-14
VI. Care and preservation----------------------- 15-17
Page
APPENDIX. References------- ------------------------------- 22
SECTION I
INTRODUCTION
1. Scope.-This manual is published for the information and guid-
ance of ordnance maintenance personnel. It contains detailed in-
structions for inspection, disassembly, assembly, maintenance, and
repair of plotting boards for Field Artillery, supplementary to those
in the Technical Manuals prepared for the using arm. Additional
descriptive matter and illustrations are included to aid in providing
a complete working knowledge of the materiel.
SECTION II
BOARD, PLOTTING, SOUND RANGING, M1
Paragraph
General _ 2-----------------------------------------------------
Description---------------------------- 3
Operation ------------------------------------------------- 4
2. General.-The sound ranging plotting board M1 is the standard
board for use by the Field Artillery in determining the location of
a sound source from sound ranging operations.
3. Description.-This plotting board (figs. 1 to 7 incl.) consists
essentially of a frame, two carriages, a range asymptote arm, and
the necessary plotting surfaces, platens, and correction charts.
a. The frame is supported by four legs. The time-difference scale,
containing five different scales, is attached to the frame on one side
452387 --42-- 1---1
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United States. War Department. Ordnance maintenance : plotting boards for field artillery, book, May 21, 1942; Washington, D.C.. (https://digital.library.unt.edu/ark:/67531/metadc29984/m1/3/?q=%22United%20States.%20Government%20Printing%20Office%22: accessed May 5, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.