TM  5-4220-231-14&P OPERATION PROCEDURES (OP)    FOR    DIVING   OPERATIONS OPERATOR CHECKLIST OP    4 DATE 1-1- STARTTIME END    TIME OPERATOR 1 OPERATOR 2 LOCATION STEP ITEM LOCATION ACTION _rP_ER- JCHEC En I FORMED BY BY SYSTEM    SET-UP OP   4.1   (Config.   2) 4.1.1 SDASS Perform Before    Operation PMCS    IAW  Table   2-1 NOTE Tag   lines   must   be   used    when    stacking DASS    Racks. NOTE Primary    and   Secondary DASS    Racks must   be   charged from   separate sources. NOTE Deck   and   Interconnecting Hose    length    must   be   considered during    setup. NOTE SDASS Configuration 2  is  shown in  Figure    2-11. 4.1.2 Bottom Position Bottom Primary DASS, Primary Racks 18  in.  to  24   in.  apart    with DASS racks    facing   the   same direction. Racks 4.1.3 Top   Primary Lift  and   then    lower   Top   Primary DASS DASS   Racks onto   the   Bottom Racks Primary    DASS    Racks as   shown in  Figure    2-12. Top  Racks must   face   the   same direction as   the   bottom    racks. 4.1.4 Bottom Position Bottom   Secondary Secondary DASS   Racks 18  in.  to  24  in. DASS apart    with  racks    facing   the Racks same direction. 4.1.5 Top Lift and   then    lower   Top Secondary Secondary DASS    Racks onto DASS the   Bottom    Secondary DASS Racks Racks as   shown in  Figure 2-12. Top  Racks must    face   the   same direction as   the   bottom racks. NOTE Secure DASS   Racks    IAW established Standard Operating Procedures (SOP). 4.1.6 VTA Approx.    25  ft.from Position    VTA. Primary DASS Rack Change 4 2-53