INDEX A Configuration—Continued AN/SPS-40E,  2-11 Aims mark XII IFF system modes of operation, 3-2 AN/SPS-49(V),  2-9 emergency  replies,  3-3 mode 1, 3-3 mode 2, 3-3 mode 3/A, 3-3 mode 4, 3-4 mode c, 3-4 SIF modes, 3-2 Air search (2D) radars, 2-8 AN/GPN-27(ASR-8),  2-13 AN/SPS-40B/C/D/E,  2-9 AN/SPS-49(V),  2-8 Altitude, 1-26 B Bearing, 1-3 bearing resolution, 1-4 relative  bearing,  1-3 true  bearing,  1-3 C Carrier-controlled  approach  (CCA)  radars,  2-15 AN/SPN-35, 2-16 AN/SPN-43, 2-16 AN/SPN-44, 2-16 AN/SPN-46(V) PALS, 2-15 Configuration,  2-3 ANEPN-63 PAR, 2-18 AN/GPN-27,  2-14 ANISPA-25G, 2-20 AN/SPN-46(V)1,  2-15 AN/SPN-46(V)2,  2-16 AN/SPS-40B/C/D, 2-11 AN/SPS-55, 2-6 AN/SPS-64(V)9, 2-5 AN/SPS-67(V)3,  2-3 D Direct  altitude  and  identity  readout  (DAIR)  system,  3-7 AATC  DAIR  (AN/TPX-42A(V)12),  3-8 CATCC  DAIR  (AN/TPX-42A(V)8),  3-8 DAIR  (AN/TPX-42A(V)5),  3-7 RATCF DAIR (AN/TPX-42A(V) 10), 3-8 Type  13,  shipboard  DAIR,  3-7 G General theory of operation, 2-2 AN/FPN-63(V),  2-18 AN/GPN-27, 2-14 AN/SPA-25G, 2-19 AN/SPN-46(V),  2-15 AN/SPS-40,  2-11 AN/SPS-49(V),  2-8 AN/SPS-55, 2-6 AN/SPS-64(V)9,  2-5 AN/SPS-67(V),  2-2 radar  indicators  (repeaters),  2-19 range-height indicator (RHI), 2-23 SB-4229/SP  switchboard,  2-22 signal  data  converter  CV-3989/SP,  2-21 General theory of IFF operation, 3-1 challenge, 3-1 interrogator, 3-1 recognition,  3-1 reply, 3-1 transponder,  3-1 INDEX-1