placed  in  the  folder  as  to  where  to  find  the drawings   related   to   that   project.   The   project number will appear in the cross-index block @ of the   index   card.   You   may,   however,   modify your index card to accommodate additional infor- mation or to suit the requirements in your unit. PROFESSIONAL DUTIES On   the   technical   side,   you,   as   an   EA3, assigned to a typical SEABEE battalion, have a variety  of  jobs  to  choose  from  or  to  be  assigned to.  The  sections  within  the  engineering  division to  which  you  may  be  assigned  are  the  drafting/ print-reproduction section, the surveying section, and  the  materials  testing  section.  Some  of  your duties  and  responsibilities  while  assigned  to  these sections are presented in the following paragraphs. ASSIGNMENT   TO   DRAFTING/ REPRODUCTION  SECTION When  you  are  first  assigned  to  the  drafting section, you are usually tasked with the simplest drafting  or  reproduction  tasks  so  that  the experienced drafting crew may be freed for more complicated   work.   These   tasks   also   serve   as training  for  the  inexperienced  draftsman.  Your drafting assignments should include, in general, a  variety  of  engineering  services  requests,  such  as reproduction   of   prints,   preparation   of   charts, revising   working   drawings,   preparing   simple construction   and   fabrication   drawings   from sketches,   and   performing   other   EA3-related office  jobs.  Other  EA-related  tasks  may  include preparing overlay maps for operational, logistics, and/or  contingency  needs;  performing  operator’s maintenance of reproduction machines; lettering, using   the   Kroy   machine;   plastic   and   metal engraving;   maintaining   a   complete   up-to-date technical library; and assisting other divisions and sections  within  the  operations  department  as directed  by  the  drafting  supervisor. Reproducing  Blueprints Quite  often,  the  bulk  of  your  job  in  the drafting section during home port is to reproduce several project drawings needed for planning and material estimates by the different construction crews  and  details.  Failure  to  produce  required quantities  on  time  could  have  an  adverse  effect on  the  whole  construction  project  planning  and execution.  To  achieve  maximum  production,  it is  essential  that  every  draftsman  be  properly trained  to  perform  this  assigned  task.  An experienced EA3 must be able to plan ahead to make   sure   that   sufficient   quantities   of   basic reproduction  material  requirements,  such  as  print paper,  are  on  hand  and  that  the  reproduction machine is in good working condition. Along with other preparations, you, as an EA3, need to learn to properly store blueprint paper and ammonia. Procedures  related  to  the  care  and  use  of reproduction  machines  and  supplies  were  dis- cussed earlier in chapter 3. Maintaining a Technical Library Another  important  responsibility  of  the drafting   section   is   that   of   establishing   and maintaining  an  engineering  technical  library  of current  reference  publications.  The  library  is  used by all personnel of the operations department as well  as  by  anyone  else  in  the  battalion  who requires technical information. To render service to  others,  the  library  must  be  maintained  in  an orderly  manner. Normally, the collateral duty of a librarian will be  assigned  to  an  EA3  working  in  the  drafting room.  He  is  responsible  for  arranging  the publications, indexing, checking in and checking out publications. He is also tasked with packing the  entire  library  for  embarkation  during  overseas deployment. Minimum  requirements  for  a  technical  library are  contained  in  a  current  COMCBPAC  5070 series  instruction.  The  instruction  includes  all administrative,   military,   and   technical   library requirements   that   have   to   be   met   by   each construction battalion. Publications not listed in the  COMCBPAC  instruction  are  included  in appendix 11 of this training manual. Additional publications  may  be  required  depending  on  the particular   mission   of   the   battalion   at   each deployment. It  is  essential  that  the  librarian  constantly monitor  the  technical  library  and  know  where each publication is at all times. Loss of important reference  publications  could  cause  delays  in solving   engineering   problems.   Security   of frequently   borrowed   publications   and   a   good checkout  system  will  help  prevent  the  loss  of important   publications. ASSIGNMENT  TO SURVEYING  SECTION One  of  the  main  units  of  the  engineering division  is  the  surveying  or  field  engineering 16-11