chain and a task-oriented operational chain that can be structured to meet particular requirements. Fleet  organization  can  be  illustrated  by  these chains, as shown in figures 11-7 and 11-8. For an example,  a  destroyer  may  administratively  belong to a squadron (DESRON) that is part of a cruiser- destroyer group (CRUDESGRU), which, in turn, is  part  of  the  surface  force  (SURFLANT)  that reports  to  the  Commander  in  Chief,  Atlantic  Fleet (CINCLANTFLT).   Operationally   the   same destroyer  may  be  deployed  as  part  of  a  task element, unit, group, and force that is part of the Seventh  Fleet  answering  to  the  Commander  in Chief,   Pacific   Fleet   (CINCPACFLT). A   task   force   is   a   subdivision   of   a   fleet composed  of  several  types  of  ships  according  to operational  necessity.  Thus,  a  task  force  may include   battleships,   aircraft   carriers,   cruisers, amphibious  craft,  and  auxiliary  vessels  such  as tenders  or  supply  ships.  When  a  fleet  is  large enough  and  its  duties  are  extensive  enough  to require  division  into  many  task  forces,  the  task forces are usually grouped into task fleets. A task force (TF) is divided into task groups (TGs). Task groups  are  assigned  numbers  corresponding  to  the particular task force of which they area part. For instance, TF 77 may have a task group assigned to  reconnaissance,  and  its  designated  number  will be  TG  77.3.  Task  groups  may  be  even  further subdivided into task units (TUs) and task elements (TEs). For example: TU 77.3.1 is Task Unit 1 of Task  Group  3  of  Task  Force  7  of  the  Seventh Fleet. Fleet  Marine  Forces  are  type  commands  under the administrative control of the Commandant of the Marine Corps. These forces operate under the respective  fleet  commander  in  chief  as  do  other type  commands. The  Military  Sealift  Command,  operated  by the Navy for all armed services, consists of ships, tankers, and commercial vessels manned by civil service  and  contract  personnel.  The  prime mission  of  the  Military  Sealift  Command  is  to provide  immediate  sealift  capability  in  an emergency. These ships transport service person- nel,  their  dependents,  combat  troops,  and  material throughout  the  world. A  shore  activity  may  be  placed  under  the command  of  the  operating  forces  if  it  is  outside the  jurisdiction  of  an  area  coordinator  or  if  it provides support only to units of operating forces. Some of the activities so assigned include naval air facilities, communication facilities, naval and submarine bases, ship repair facilities, naval repair facilities,  and  supply  depots. The operating forces are responsible for naval operations  necessary  to  carry  out  the  department’s role  in  upholding  and  advancing  the  national policies  and  interests  of  the  United  States. Organization simplest   form, SUMMARY is  not  a  new  concept.  In  its organization  is  the  orderly arrangement  of  assets.  As  a  naval  officer,  you must  understand  the  organization  of  our  Navy. Our Constitution authorized the building and support  of  our  Navy  as  well  as  the  Army.  The Constitution also stated that the President of the United  States  would  be  the  commander  in  chief of  the  Army  and  Navy.  You  have  read  the examples of Presidential acts that exemplify the power  of  the  commander  in  chief. In 1949 the National Security Act (NSA) was amended,  thus  establishing  the  Department  of Defense as we know it today. This act established the position of Secretary of Defense and gave the position presidential cabinet rank. The NSA also established  the  Joint  Chiefs  of  Staff  (JCS).  The Joint Chiefs of Staff are the top individuals from each service who advise the Secretary of Defense and  the  President  on  all  military  matters.  The naval   representative   is   the   Chief   of   Naval Operations (CNO). The CNO is a member of the Department of the Navy (DON), and so are you. The  Department  of  the  Navy  is  composed  of three  major  parts:  the  Navy  Department,  the shore  establishment,  and  the  operating  forces. From  this  chapter,  you  can  follow  the  chain of command from your activity to the commander in chief. You can also see how the other branches of the military fit into this chain. as well as their mission defense and  functions,  thus  covering  the  basic structure  of  our  nation. REFERENCES Military  Requirements  for  Petty  Officer  First Class,  NAVEDTRA  12046,  Naval  Education and Training Program Management Support Activity,  Pensacola,  Fla.,  1991. Military  Requirements  for  Petty  Officer  Second Class,  NAVEDTRA  12045,  Naval  Education and Training Program Management Support Activity,  Pensacola,  Fla.,  1991. 11-17