screen. Determine the screen size you  should use by judging  the  distance  from  the  screen  to  the  most remote viewer. The placement of the screen will vary with the need to position  other  required  items,  such as   a   chalkboard   or   an   easel.   After   you   have determined a tentative position for the screen, project an  image  on  the  screen  and  check  the  view  from different parts of the room to make sure everyone will be able to see clearly. Sound Level.— In an audiovisual presentation, the  sound  level  is  just  as  critical  as  the  visibility.  A sound level that seems loud enough during a practice session  may  be  entirely  too  low  with  a  room  full  of people. To accommodate the acoustic effects resulting from the number of people in the viewing area, adjust the sound level at the beginning of the presentation. Special Techniques.— Some special techniques you can use that may go unnoticed by the audience  but  will  add  to  the  effectiveness  of  the presentation  are  (1)  providing  a  sharp  focus  of  the projected image; (2) filling the screen with the image; (3)   preventing   abrupt   light   changes;   (4)   avoiding unpleasant sounds; and (5) fading the picture. Safety  Concerns.—  Finally,   as   one   of   your most   important   concerns,   pay   attention   to   safety matters.  Make  certain  you  use  and  check  for  the following safety guidelines: Tape cords down with masking tape or cover them  with  a  piece  of  carpet  to  prevent  people  from tripping. When  people  walk  or  sit  near  the  electrical outlet, ask them not to jar the plug. Tie the extension cord to the table leg so that the  equipment  will  not  be  pulled  to  the  floor  if  the cord is kicked. Use  three-wire  adapters.  Do  not  break  the third wire prong from a cord. Do not use frayed or cracked cords. Make   sure   the   cord   is   large   enough   to operate the equipment without heating up. When    several    pieces    of    equipment    are involved,  use  a  pigtail.  The  pigtail  is  better  than stringing several extension cords together. Have  a  spare  lamp  available  and  practice changing it. Never handle a new lamp with your bare hands. The oil from your hands will cause the glass to heat unevenly and shorten the life of the lamp.. Do  not  use  unsturdy,  makeshift  tables  to hold equipment. In     addition     to     the     actual     setup,     your responsibilities for setting  up  will  include  looking  at the  total  environment—heat,  lights,  and  ventilation. Remember,  your  duties  in  support  of  an  event  will continue until the event is over and the people have left.  If  something  should  happen  in  the  middle  of  a presentation  or  service,  you  must  be  alert  to  detect and correct the  problem.  This  cannot  be  done  if  you are sitting  in  an  office  while  problems  are  surfacing in the sanctuary or fellowship hall. PUBLICITY Publicity is an important tool of the CRP. Lack of publicity  may  prevent  the  CRP  from  meeting  the needs  of  the  command  and  the  people  for  whom  it exists, Navy and Marine Corps service members and their families. Goals Each   CRP   must   develop   its   own publicity program, determine specific goals and objectives to be met, and work out the methods to reach these goals. Your responsibilities will require you  to work closely with  the  local  Navy  or  Marine  Corps  public  affairs office (PAO) to spread religious program information and carry out your CRP’s publicity goals. First,   you   must   work   with   the   chaplains   to determine    what    activities    and    events    require publicity.  An  accurate  idea  of  the  nature,  purpose, and   goals   of   a   particular   RMF   activity—whether religious or secular—will help you determine the type of publicity that should be used. Figure 2-17 outlines some religious, community, and family activities that may require publicity. Figure 2-17.—Religious, community, and family activities to be considered in publicity programs. 2-26