TM 55-1510-219-10 9-33.  DITCHING. If  a  decision  to  ditch  is  made,  immediately alert  all  crewmembers  to  prepare  for  ditching.    Plan the approach into the wind if the wind is high and the seas are heavy.  If the swells are heavy but the wind is light, land parallel to the swells.  Set up a minimum rate   descent   (power   on   or   off,   as   the   situation dictates airspeed 110-120 KIAS).  Do not try to flare as in a normal landing, as it is very difficult to judge altitude    over    water,    particularly    in    a    slick    sea. Leveling off too high may cause a nose low "drop in," while having the tail too low on impact may result in the aircraft pitching forward and "digging in.  " Expect more   than   one   impact   shock   and   several   skips before  the  final  hard  shock.    There  may  be  nothing but   spray   visible   for   several   seconds   while   the aircraft is decelerating.  To prevent cartwheeling, it is important  that  the  wings  be  level  when  the  aircraft hits the water.  After the aircraft is at rest, supervise evacuation   of   passengers   and   exit   the   aircraft   as quickly  as  possible.    In  a  planned  ditching,  the  life raft  and  first-aid  kits  should  be  secured  close  to  the cabin    emergency    hatch    for    easy    access    when evacuating; however, do not remove the raft from its carrying  case  inside  the  aircraft.    After  exiting  the aircraft,   keep   the   raft   away   from   any   damaged surfaces   which   might   tear   or   puncture   the   fabric. The length of time that the aircraft will float depends on  the  fuel  level  and  the  extent  of  aircraft  damage caused by the ditching.  Refer to Figure 9-3 for body positions during ditching, and Table 9-1 for personnel procedures. Figure 9-4 shows wind swell information.  Perform the following procedures: WARNING Do  not  unstrap  from  the  seat until   all   motion   stops.      The possibility of injury and disorientation requires that evacuation   not   be   attempted until   the   aircraft   comes   to   a complete stop. 1. Radio calls/transponder-As required. 2. Crew emergency briefing-As required. 3. Bleed air valves-ENVIRO OFF. 4. Cabin pressurization switch-DUMP. 5. Cabin emergency hatch-Remove and stow. 6. Seat belts and harnesses-Secured. 7. Gear-UP. 8. Flaps-DOWN. 9. Nonessential electrical equipment-OFF. 10. Approach-Normal, power on. 11. Emergency lights-As required.  Ditching 9-34.  FLIGHT CONTROLS MALFUNCTION. Use the following procedures, as applicable, for flight control malfunctions. a. Unscheduled Rudder Boost Activation. Rudder  boost  operation  without  a  large  variation  of power   between   engines   indicates   a   failure   of   the system.  Perform the following: 1. Rudder boost-OFF. NOTE The  rudder  boost  system  may not   operate   when   the   brake deice system is in use. Availability of the rudder boost system    will    be    restored    to normal when the BRAKE DEICE switch is turned OFF. IF CONDITION PERSISTS: 2. Bleed    air    valve    switches-PNEU    & ENVIRO-OFF. 3. Rudder trim-Adjust. b. Unscheduled  Electric  Elevator  Trim.    In  the event  of  unscheduled  electric  elevator  trim,  perform the following: 1. ELEV TRIM switch OFF. 2. ELEC TRIM circuit breaker OUT. 9-35.  BAILOUT. When    the    decision    has    been    made    to abandon  the  aircraft  in  flight.    the  pilot  will  give  the warning signal.  Exit from the aircraft will be through the    main    entrance    door,    and    in    the    departure sequence using the exit routes as indicated in Figure 9-1.          Proceed     as     follows     if     bailout     becomes necessary: 1. Notify copilot to prepare to bail out. 2. Distress message Transmit. 3. Voice security ZEROIZE. 9-14