understand the different types, titles, categories, arrangement,  and  locations  of  applicable  supply data included in them. A TD may direct that com- ponent  parts  or  material  be  added,  removed, changed,   altered,   relocated,   or   repositioned. NAVAIR has management responsibility for the configuration  management  program.  This  pro- gram   was   established   to   control   and   track modifications  to  aeronautical  equipment  using  the TD  system.  Specific  information  concerning  the TD   program   is   in   NAVAIRINST   5218.8. Additional   information   concerning   TD   com- pliance at the O-, and I-, and D-levels, documen- tation  procedures,  and  reporting  requirements may be found in volumes II, III, and IV of Naval Aviation   Maintenance   Program   (NAMP),   OP- NAVINST   4790.2. There  are  two  types  of  TDs,  formal  and informal,  which  are  distinguished  by  their  method of  dissemination.  They  are  normally  distributed as  technical  notes/orders,  bulletins,  or  changes. There  are  three  action  categories  of  TDs: immediate, urgent, and routine. These categories are important to the AK because they determine the  priority  on  which  the  TD  kits/parts  may  be requisitioned.  These  categories  are  as  follows: Immediate, This category is assigned to TDs when an uncorrected safety condition exists that could result in a fatal or serious injury to person- nel,  destruction  to  valuable  property,  or  extensive damage.   Compliance   must   be   accomplished before returning aircraft or equipment to service. Kits/parts  required  in  this  category  should  be requisitioned  using  supply  issue  group  I. Urgent. This category is assigned to TDs when a  potentially  hazardous  condition  exists  that,  if uncorrected, could result in injury to personnel, damage  to  valuable  property,  or  unacceptable reduction in operational efficiency. Although this category  does  not  remove  aircraft/equipment from service, it does have a date or specific time frame   (for   example,   next   phase   inspection) assigned by which the TD must be accomplished. Kits/parts in this category should be ordered using supply issue group I or II, depending on the date assigned  for  completion. Routine.  This  category  is  assigned  to  TDs when  there  are  reliability,  capability,  or  main- tainability deficiencies that, if uncorrected, could become a hazard through prolonged use or have an adverse effect on the life or use of the affected equipment. This category does not have specific compliance   dates   assigned.   Kits/parts   in   this category  should  be  requisitioned  using  supply issue  group  III. INSTRUCTIONS  AND  NOTICES Various  instructions  and  notices  issued  by DOD,  OPNAV,  SECNAV,  NAVSUP,  and  ASO are  covered  in  the  following  paragraphs. Naval Aviation Maintenance Program The  Naval  Aviation  Maintenance  Program (NAMP), OPNAVINST 4790.2, is sponsored and directed  by  the  CNO  and  addresses  CNO  con- cepts,   objectives,   policies,   programs,   organiza- tions,   and   responsibilities   as   they   apply   to aviation maintenance for each level of command. Each level is discussed in detail within each volume as  follows: Volume  I. Concepts,  Objectives,  Policies, Organizations,  and  Representatives Volume II. Organizational  Level  Maintenance Volume  III. Intermediate Level Maintenance Volume   IV. Depot  Level  Maintenance Volume   V. Data  Processing  Requirements OPNAVINST 4790.2 is the basic instruction that outlines  duties  and  responsibilities  of  a  supervisor working  in  material  control  divisions  of  a squadron  or  an  aircraft  intermediate  maintenance department   (AIMD)   or   involved   in   SSC operations. Uniform Material Movement and Issue Priority System The  Uniform  Material  Movement  and  Issue Priority  System  (UMMIPS),  OPNAVINST 4614.1,   contains   information   concerning   force activity  designators  (FADs),  issue  policy designators,   requisition   processing,   delivery dating,  mission  essential  material,  abuses  and policing  of  the  priority  system,  and  expedited handling  of  critically  needed  items. Fleet Use of MILSTRIP The  Fleet  Use  of  MILSTRIP,  NAVSUPINST 4235.3, is designed to be used for indoctrination 1-20