armored   targets.   These   warheads   contain   a   large number  of  small  arrow-shaped  projectiles.  A  small explosive  charge  in  the  base  fuze  of  the  warhead dispenses   the   flechettes   through   the   nose   of   the warhead after rocket motor burnout. Target damage is caused by impact of the high-velocity flechettes. SMOKE  WARHEADS.—Smoke  warheads  (fig. 2-10) are used to produce a volume of heavy smoke for target marking. The warhead contains a burster tube of explosives, usually comp-B, which bursts the walls of the warhead, dispersing the smoke. These warheads are designated  SMOKE,  followed  by  the  abbreviation  for the  smoke  producing  agent  it  contains.  For  example, WP for white phosphorus, or PWP for plasticized white phosphorus. The types of smoke warheads currently in use are listed in table 2-1. FLARE   WARHEADS.—Flare    warheads    (fig. 2-11)  are  used  to  illuminate  tactical  operations.  They consist of a delay-action fuze, an illuminating candle, and   a   parachute   assembly.   The   fuze   ignites   the expelling  charge,  which  separates  the  case  from  the candle and parachute assembly. The wind stream forces the parachute open, suspending the burning candle. The only flare warhead currently in use is the Mk 33 Mod 1. PRACTICE  WARHEADS.—Practice  warheads are    either    dummy    configurations    or    inert-loaded service warheads. In the inert-loaded service warheads, the weight and placement of the filler gives the practice warhead   the   same   ballistic   characteristics   as   the explosive-loaded service warhead. A steel nose plug is assembled  in  the  practice  heads  in  place  of  the  nose fuze.   The   entire   surface,   except   for   the   stenciled marking,   is   painted   blue.   The   practice   warheads currently in use are listed in table 2-2. Table 2-2.—Practice Warheads 2.75-INCH 5.0-INCH WTU1/B M230 Mk 6 Mod 7 Mk 32 Mod 1 Mk 24 Mod 0 WTU-11/B REVIEW NUMBER 2 Q1. What  color  are  high-explosive  rocket  war- heads? Q2. What type of targets are HE-FRAG warheads used against? Q3. The    AT/APERS    warhead    is    an    effective combination of what other warheads? Q4. What  warhead  contains  a  large  number  of small, arrow-shaped projectiles? Q5. Smoke warheads produce a volume of heavy smoke for ___________. Q6. What  warhead  is  used  to  illuminate  tactical operations? Fuzes Rocket   fuzes   are   primarily   classified   by   their location in the warhead; for example, nose fuze or base fuze. They are further classified by mode of operation, such  as  impact-firing,  mechanical-time,  acceleration and   deceleration,   or   proximity.   All   fuzes   contain safety/arming   devices   to   prevent   detonation   during normal  transporting,  handling,  and  launching  of  the complete rocket. 2-9 Figure 2-11.—Mk 33 Mod 1 flare warhead.