retarded (high-drag) or unretarded (low-drag) bomb delivery capability for the aircraft. The BSU-86/B fin is attached to the Mk 82 or BDU-45/B bomb by eight setscrews. A 25-degree wedge is located at the tips of each fin to impart spin. The airstream drives the fin open rapidly, when the MAU- 199/B spring arming wire (SAW)  is  activated  Fin  opening  is  initiated  by  the spring load under each fin blade. REVIEW NUMBER 6 Q1.  What  type  of  bomb  is  used  in  most  bombing operations? Q2.  Name  the  type  of  pallets  on  which  bombs  are shipped. Q3.  Bombs  are  shipped  on  metal  pallets  because . Q4. List the two types of bomb fins. Q5.  The  Mk  fin  is  used  with  the                      LDGP Q6. Q7. What adapter is used to mate the MAU-91A/B fin to the Mk 83 bomb? List  the  three  modes  of  delivery  used  with Snakeye  fins. GUIDED BOMB UNITS LEARNING   OBJECTIVE:  Identify  the different types, purpose, use, and operation of guided bomb units. GBU-12, GBU-16, AND GBU-10 The  GBU-12,  GBU-16,  and  GBU-10  guided  bomb units (GBUs) (fig. 1-33) are Mk 82, Mk 83, and Mk 84 LDGP  bombs  modified  to  detect  a  target  illuminated  by a laser beam. The modification consists of a MAU-169 series computer control group (CCG) and MXU-650, 651,  or  667  series  airfoil  group  (AFG).  Each  AFG contains identical items; although they are different in physical  size,  they  perform  identical  functions.  A typical AFG is composed of a folding wing assembly, bomb. Figure  1-33.—Typical  guided  bomb  unit  configurations. 1-36