specifically designated stowage spaces. Ammunition stowage spaces aboard ships are limited, and in certain classes of ships, extremely limited. Therefore, ammunition stowed aboard ship should stay within authorized ammunition allowances. Its important for shipboard ammunition to be stowed so maximum effectiveness is achieved. For these reasons, strict compliance with ammunition stowage by compatibility groupings aboard ship, while desirable and observed when practical, may not be feasible. When mixed stowage is used, make sure that it conforms to the stowage tables listed in Ammunition Afloat, NAVSEA OP 4. REVIEW NUMBER 1 Q1. What command develops and approves specifications for construction of Navy ships? Q2. A ship's primary magazines are usually located _______________. Q3. What types of magazines are located close to the area to be served? Q4. What is the purpose of modular stowage? Q5. List   the   two   areas   that   the   IRRP   created improved handling. Q6. Generally, magazines aboard ship are designated to hold _____________. Q7. Authority for stowing mixed types of ammunition in a magazine rest with ________. ENVIRONMENTAL CONTROL SYSTEMS Magazines  are  fitted  with  environmental  control and    safety    features    to    protect    ammunition    from excessive temperatures and humidity. Most magazines have either mechanical cooling or ventilation systems. However,  there  are  a  few  magazines  that  don't  have either of these features. If a magazine without controls shows  a  heat  gain  in  excess  of  100ºF,  use  portable ventilation systems to prevent overheating or condensation of moisture. Supply and Exhaust Ventilation Ventilation ducts and exhaust ventilation outlets to and from magazines provide forced-air ventilation. Air is  forced  through  the  ducts  by  electric  fans  installed within the ductwork. Standard covers maintain watertightness and prevent the entrance of flames from hits  on  the  ship  during  combat.  Always  close  these covers  during  combat  (general  quarters)  conditions, unless  otherwise  directed.  If  you  inhale  fumes  from some  types  of  ammunition,  you  might  get  slightly intoxicated.   However,   this   should   not   appreciably reduce   your   work   efficiency.   Generally,   there   is sufficient  air  volume  in  large,  sealed  magazines  and handling rooms to provide a safe working atmosphere for    approximately    5    hours.    Magazines    that    are continuously occupied by personnel are blown through or ventilated a minimum of once every 5 hours. Magazine Vent Check Valves Sometimes, it is necessary to operate the sprinkler system  in  magazines  while  the  ventilation  valves  are secured.  When  this  happens,  the  magazine  must  be vented  by  an  air  escape  to  ensure  that  the  pressure within   the   magazine   doesn't   build   up   beyond   the allowed  pressure  limits  of  its  watertight  boundaries. Magazine  check  valves  allow  air  and  water  to  escape from the magazine into one of the ventilation ducts or through an independent air escape. REVIEW NUMBER 1 ANSWERS A1. NAVSEASYSCOM    develops    and    approves specifications for construction of Navy ships. A2. A    ship's    primary    magazines    are    usually located below the waterline. A3. Ready-service magazines are located close to the area to be served. A4. The purpose of modular stowage is to give the greatest versatility and to minimize ammunition handling. A5. The two areas that the IRRP created improved handling are rearming and weapons assembly. A6. Generally, magazines aboard ship are designated   to   hold   a   single   type   of   am- munition. A7. Authority for stowing mixed types of ammunition in a magazine rest with NAVSEASYSCOM. Exhaust Vents Aboard ship, most magazines, particularly missile magazines, are vented to the atmosphere. When missile 11-11