TABLE I1 NAVIGATION SUMMARY SECTOR D CODE YEAR SHIP DATA CRUISE SOURCE a0603 1971 Atlantis 2 T CR 60 L3 Woods Hole a0604 1971 Atlantis 2 T CR 60 L4 Woods Hole a1076 1980 Atlantis 2 MT CR 107 L6 Woods Hole a1079 1980 Atlantis 2 T CR 107 L9 Woods Hole a2602 1971 Atlantis 2 MT CR 60 L2 Woods Hole a2675 1972 Atlantis 2 GMT CR 67 L5 Woods Hole a2932 1975 Atlantis 2 MT CR 93 L2 Woods Hole akk20 1975 Ak Kurchatov G T USSR bbr01 1972 M Brazil ? bbr02 1972 M Brazil ? br574 1975 M br675 1976 MT br776 1976 M br778 1977 MT br789 1979 MT brm01 1969 MT bs721 1972 Besnard GMT CR 72 L1 Woods Hole bs722 1972 Besnard T CR 72 L2 Woods Hole carr1 1964 Baird GMT Carousel L1 Scripps carr2 1964 Baird MT Carousel L2 Scripps cato4 1972 Melville MT Cato L4 Scripps cato5 1972 Melville MT Cato L5 Scripps cato6 1972 Melville MT Cato L6 Scripps cn153 1974 Chain GMT CR 115 L3 Woods Hole cn154 1974 Chain GMT CR 115 L4 Woods Hole cn155 1974 Chain GMT CR 115 L5 Woods Hole cn156 1974 Chain GMT CR 115 L6 Woods Hole dnwbb 1957 Baird MT Downwind LB Scripps dnwbc 1957 Baird T Downwind LC Scripps enap2 1977 Western Shoal GMT Chile fd771 1976 Melville MT F.Drake77 L1 Scripps fd772 1977 Melville MT F.Drake77 L2 Scripps fd773 1977 Melville MT F.Drake77 L3 Scripps fdrk2 1975 Melville T F.Drake L2 Scripps fdrk3 1975 Melville MT F.Drake L3 Scripps fm015 1979 Fred Moore MT CR 1 L5 U. Texas fm016 1979 Fred Moore MT CR 1 L6 U. Texas ggl35 1974 Glomar Challenger MT DSDP L35 Scripps ggl36 1974 Glomar Challenger MT DSDP L36 Scripps ggl39 1974 Glomar Challenger MT DSDP L39 Scripps ggl70 1979 Glomar Challenger MT DSDP L70 Scripps ggl71 1980 Glomar Challenger MT DSDP L71 Scripps ggl72 1980 Glomar Challenger MT DSDP L72 Scripps hud01 1969 Hudson GMT Canada hud02 1969 Hudson GMT Canada hud03 1969 Hudson GMT Canada hud04 1969 Hudson GMT Canada hud05 1969 Hudson GMT Canada hud06 1969 Hudson GMT Canada inm12 1978 Melville MT Indomed L12 Scripps inm13 1978 Melville MT Indomed L13 Scripps inm15 1979 Melville T Indomed L15 Scripps jch45 1973 Jean Charcot MT 73003011 France jch47 1973 Jean Charcot MT 73003111 France G = gravity data, M = magnetics data, T = topography data CR = cruise, L = leg NOAA = National Oceanic and Atmospheric Administration TABLE I1 NAVIGATION SUMMARY SECTOR D CODE YEAR SHIP DATA CRUISE SOURCE kk904 1974 Kana Keoki GMT 74010904 Hawaii Inst.Geophys. kk905 1974 Kana Keoki GMT 74010905 Hawaii Inst.Geophys. ko20a 1975 Ak Kurchatov G 77060003 Int.Grav.Bur.,USSR p6702 1967 Oceanographer GMT POL7602 NOAA p7008 1970 Oceanographer GMT POL7008 NOAA p7303 1973 Oceanographer GMT POL7303 NOAA p7304 1973 Oceanographer GMT POL7304 NOAA piq02 1969 T.Washington T Piquero L2 Scripps piq03 1969 T.Washington MT Piquero L3 Scripps piq04 1969 T.Washington MT Piquero L4 Scripps rsa73 1973 RSA T South Africa rsa75 1975 RSA T South Africa rsa76 1976 RSA T South Africa sh473 1974 Shackleton MT United Kingdom sot02 1972 T.Washington MT Southtow L2 Scripps sot03 1972 T.Washington MT Southtow L3 Scripps td377 1978 T.B.Davie MT CR 377 South Africa td388 1979 T.B.Davie MT CR 388 South Africa td397 1979 T.B.Davie T CR 397 South Africa um66b 1966 Umitaka Maru MT U. Tokyo um66c 1966 Umitaka Maru MT U. Tokyo vlcn3 1980 Melville T Volcano L3 Scripps vlcn4 1980 Melville MT Volcano L4 Scripps yq734 1973 Yaquina MT YAQ7304 Oregon State Univ. yq735 1974 Yaquina GMT YAQ7305 Oregon State Univ. yq736 1974 Yaquina GMT YAQ7306 Oregon State Univ. zap23 1963 Zapiola MT CR 2 L3 Argentina zap24 1963 Zapiola M CR 2 L4 Argentina G = gravity data, M = magnetics data, T = topography data CR = cruise, L = leg NOAA = National Oceanic and Atmospheric Administration