TM 1-1510-225-10 9-16 9-34.  DITCHING. If a decision to ditch is made, immediately  alert all   personnel   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).    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  at  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  exit  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  from any damaged surfaces that 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.    Table  9-1  lists  the appropriate duties for crew and occupants for planned and immediate ditching.  Refer to Figure 9-3 for body positions during ditching.  Figure 9-4 shows sea swell information.  Perform the following procedure: Do   not   unstrap   from   the   seat   until   all motion  stops.    Do  not  attempt  evacuation until the aircraft comes to a complete stop due    to    the    possibility    of    injury    and disorientation. 1.  Radio calls/transponder – As required. 2.  Personnel     emergency     briefing     –     As required. 3.  BLEED  AIR  VALVES  –  PNEU  &  ENVIR OFF. 4.  CABIN PRESS switch – DUMP. 5.  CABIN   signs   switch   –   NO   SMOKE   & FSB. 6.  Cabin  emergency   exit   hatch   –  Remove and stow. 7.  Seat belts and harnesses – Secure. 8.  GEAR – UP. 9.  FLAPS – DOWN. 10.   Nonessential electrical equipment – Off. 11.   Approach – Normal, power on. 12.   Emergency lights – As required. 9-35.  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.  RUDDER BOOST circuit breaker – Pull. 3.  BLEED AIR VALVE – OFF (below 10,000 feet). 4.  Rudder trim – Adjust. b.  Unscheduled Electric Elevator Trim.  In the event  of  unscheduled  electric  elevator  trim,  perform the following: 1.  Control  wheel  disconnect  switch  –  Press fully. 2.  Elevator trim switch – OFF. 3.  AP TRIM POWER circuit breaker – Out. WARNING O