GPS 18 Technical Specifications (190-00307-00) Rev. DPage 21The default pulse width is 100 ms, however; it may be programmed in 20 ms increments between 20 msand 180 ms as described in $PGRMC Section 4.1.2 Sensor Initialization Information (PGRMI), field <13>.APPENDIX A: EARTH DATUM LISTThe following is a list of the Garmin GPS 18 Earth datum indices and the corresponding earth datum name(including the area of application):0 ADINDAN–Ethiopia, Mali, Senegal, Sudan1 AFGOOYE–Somalia2 AIN EL ABD 1970–Bahrain Island, Saudi Arabia3 ANNA 1 ASTRO 1965–Cocos Island4 ARC 1950–Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe5 ARC 1960–Kenya, Tanzania6 ASCENSION ISLAND 1958–Ascension Island7 ASTRO BEACON “E”–Iwo Jima Island8 AUSTRALIAN GEODETIC 1966–Australia, Tasmania Island9 AUSTRALIAN GEODETIC 1984–Australia, Tasmania Island10 ASTRO DOS 71/4–St. Helena Island11 ASTRONOMIC STATION 1952–Marcus Island12 ASTRO B4 SOROL ATOLL–Tern Island13 BELLEVUE (IGN)–Efate and Erromango Islands14 BERMUDA 1957–Bermuda Islands15 BOGOTA OBSERVATORY–Colombia16 CAMPO INCHAUSPE–Argentina17 CANTON ASTRO 1966–Phoenix Islands18 CAPE CANAVERAL–Florida, Bahama Islands19 CAPE–South Africa20 CARTHAGE–Tunisia21 CHATHAM 1971–Chatham Island (New Zealand)22 CHUA ASTRO–Paraguay23 CORREGO ALEGRE–Brazil24 DJAKARTA (BATAVIA)–Sumatra Island (Indonesia)25 DOS 1968–Gizo Island (New Georgia Islands)26 EASTER ISLAND 1967–Easter Island27 EUROPEAN 1950–Austria, Belgium, Denmark, Finland, France, Germany, Gibraltar, Greece,Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland28 EUROPEAN 1979–Austria, Finland, Netherlands, Norway, Spain, Sweden, Switzerland29 FINLAND HAYFORD 1910–Finland30 GANDAJIKA BASE–Republic of Maldives31 GEODETIC DATUM 1949–New Zealand32 ORDNANCE SURVEY OF GREAT BRITAIN 1936–England, Isle of Man, Scotland, ShetlandIslands, Wales33 GUAM 1963–Guam Island