▁K ran z berg , ▁which ▁lies ▁on ▁the ▁Wind ho ek - Sw ak op mund - W al vis ▁Bay ▁route . ▁ ▁Gallery ▁ ▁See ▁also ▁Rail ▁transport ▁in ▁Nam ib ia ▁ ▁References ▁ ▁External ▁links ▁ ▁Wind ho ek ▁railway ▁station ▁at ▁struct ura e . net ▁ ▁First ▁railway ▁lines ▁in ▁Nam ib ia ▁ ▁Category : Build ings ▁and ▁structures ▁in ▁Wind ho ek ▁Category : R ail way ▁stations ▁in ▁Nam ib ia ▁Category : Trans N am ib ▁Railway ▁Category : R ail way ▁stations ▁opened ▁in ▁ 1 9 1 2 ▁Category : 1 9 1 2 ▁establish ments ▁in ▁German ▁South ▁West ▁Africa <0x0A> </s> ▁A ▁P IG A ▁( P end ul ous ▁Integr ating ▁Gy ro scop ic ▁Acc eler ometer ) ▁is ▁a ▁type ▁of ▁acceler ometer ▁that ▁can ▁measure ▁acceleration ▁and ▁simultaneously ▁integr ates ▁this ▁acceleration ▁against ▁time ▁to ▁produce ▁a ▁speed ▁measure ▁as ▁well . ▁ ▁The ▁P IG A ' s ▁main ▁use ▁is ▁in ▁In ert ial ▁Navigation ▁Systems ▁( IN S ) ▁for ▁guidance ▁of ▁aircraft ▁and ▁most ▁particularly ▁for ▁ball istic ▁miss ile ▁guidance . ▁ ▁It ▁is ▁val ued ▁for ▁its ▁extremely ▁high ▁sens itivity ▁and ▁accuracy ▁in ▁conj unction ▁with ▁operation ▁over ▁a ▁wide ▁acceleration ▁range . ▁▁ ▁The ▁P IG A ▁is ▁still ▁considered ▁the ▁premier ▁instrument ▁for ▁strateg ic ▁grade ▁miss ile ▁guidance , ▁though ▁systems ▁based ▁on ▁ME MS ▁technology ▁are ▁attract ive ▁for ▁lower ▁performance ▁requirements .