Joint Doctrine for Amphibious Operations - Historic Naval Ships ...

Chapter XIIXII-4•• Aircraft requisitioned by the USGovernment; and•• Aircraft provided by allied andfriendly governments.b. Multiple Transport Groups. If morethan one landing area is established in theoperational area, additional transport groups(one for each landing area) are formed.Transport groups are combat loaded to supportthe landing plan of the assigned landing area.Each amphibious transport group is assignedassault ships and lighterage required by theLF in its assigned landing area.c. Movement Group(s). The ATF maybe task-organized into movement groupsbased on POEs, and individual ship speed,mission, and required arrival time in theoperational area. Using the above criteria, allNavy forces, self-deploying LF aircraft, andself-deploying Air Force units should be taskorganizedinto separate movement groups. Amovement group will include all requiredscreen and logistic support.d. Pre-D-day Groups. The advance force,when used, usually proceeds to the landingarea as a single movement group. However,if there is a wide disparity of speed betweenvarious ships, or if part of the LF is requiredto capture nearby islands or other key terrainbefore the arrival of the main body of theamphibious force, it may be necessary toorganize the advance force into two ormore movement groups, each with a screen.• The main body of the amphibious forcemust arrive on or before D-day andshould consist of the following groups,each with a screen: one or more transportgroups, one or more combat logisticgroups, and one or more support battlegroups.• Under certain conditions, it may bedesirable to attach all or part of thecombat logistic groups and support battlegroups to the transport groups to providesupport and protection from attack whileen route. Protection from attack whileen route may also be provided by forcesnot part of the amphibious force.• Elements of the amphibious force maybe phased into the operational area byechelons, instead of being brought insimultaneously. The elements arrivingon D-day may consist only of the forcesrequired to initiate the assault landing.The remaining elements may be phasedin during succeeding days.e. Post-D-day Groups. Movement groupsof the amphibious force scheduled to arrivein the operational area after D-day will usuallybe assigned a screen for force protection.f. Follow-up. The first follow-up elementsmay arrive in the operational area beforeunloading of the AE or AFOE ships iscomplete. In such cases, OPCON or TACONof these elements will normally be passed tothe CATF at a designated point before theirarrival in the operational area. The CATFretains OPCON or TACON of these elementsuntil such time as the amphibious operationis terminated, the elements are detached fromthe amphibious force, or another offloadauthority has been designated.See JP 4-01.6, Joint Tactics, Techniques, andProcedures for Joint Logistics Over-the-Shore(JLOTS), and JP 4-01.5, Joint Tactics,Techniques, and Procedures forTransportation Terminal Operations forfurther information.4. Planning Responsibilitiesa. Movement Plan. The CATF isresponsible for preparing a movement planduring the planning phase. In operationsinvolving several attack groups, the CATFusually prepares a general movement plan inJP 3-02