TM 1-1510-218-10 1-1 CHAPTER 1 INTRODUCTION 1-1.  GENERAL. These  instructions  are  for  use  by  the  operator.   They  apply  to  the  C-12C,  C-12D1,  C-12D2,  C-12T1, and C-12T2 model aircraft. 1-2.  WARNINGS, CAUTIONS, AND NOTES. Warnings,    cautions,    and    notes    are    used    to emphasize  important  and  critical  instructions  and  are used for the following conditions: An    operating    procedure,    practice,    etc., which,    if    not    correctly    followed,    could result in personal injury or loss of life. CAUTION An    operating    procedure,    practice,    etc., which, if not strictly observed, could result in damage to or destruction of equipment. NOTE An   operating   procedure,   condition,   etc., which is essential to highlight. 1-3.  DESCRIPTION. This manual contains the best operating instructions and procedures for the aircraft under most circumstances. The observance of limitations, performance,    and    weight/balance    data    provided    is mandatory.          The     observance     of     procedures     is mandatory    except    when    modification    is    required because   of   multiple   emergencies,   adverse   weather, terrain,  etc.    Basic  flight  principles  are  not  included.   THIS     MANUAL     SHALL     BE     CARRIED     IN     THE AIRCRAFT AT ALL TIMES.  Manuals printed from  CD must be on standard 8 1/2 x 11 paper. Users are authorized to remove the chapters that are  not  applicable  to  their  aircraft  model   and  are  not required to carry those chapters on-board. 1-4.  APPENDIX A, REFERENCES. Appendix   A   is   a   listing   of   official   publications cited within the manual applicable to and available for flight crews. 1-5.  APPENDIX B, ABBREVIATIONS AND TERMS. Appendix   B   is   a   listing   of   abbreviations   and terms used throughout the manual. 1-6.  INDEX. The index lists, in alphabetical order, every titled paragraph, figure, and table contained in this manual.    1-7.  ARMY AVIATION SAFETY PROGRAM. Reports   necessary   to   comply   with   the   safety program are prescribed in AR 385-40. 1-8.  DESTRUCTION     OF     ARMY     MATERIEL     TO PREVENT ENEMY USE. For  information  concerning  destruction  of  Army materiel to prevent enemy use, refer to TM 750-244-1-5. 1-9.  FORMS AND RECORDS. Army aviators' flight records and aircraft maintenance    records,    which    are    to    be    used    by crewmembers, are prescribed in AR 95-1 and DA PAM 738-751  respectively.    Weight  and  balance  require- ments   are   prescribed   in   AR   95-1   with   procedures found in TM 55-1500-342-23. 1-10.  EXPLANATION OF CHANGE SYMBOLS. a.   General.    Change    symbols    show    current changes   only.      Change   symbols   are   not   used   to indicate    changes    in    the    following:        introductory material;  indexes  and  tabular  data  where  the  change cannot  be  identified;  blank  space  resulting  from  the deletion of text, an illustration or a table; or correction of  minor  inaccuracies,  such  as  spelling,  punctuation, relocation  of  material,  etc.,  unless  correction  changes the meaning of instructive information and procedures. b.  Text  and  Table  Changes.     Changes  to  text and  tables,  including  new  material  on  added  pages, are  indicated  by  a  vertical  line  in  the  outer  margin extending   close   to   the   entire   area   of   the   material affected. c.   Illustration  Changes.     A  miniature  pointing hand   symbol   is   used   to   denote   a   change   to   an illustration.      However,   a    vertical   line   in   the   outer margin,  rather  than  miniature  pointing  hands,  is  used WARNING