▁developed ▁the ▁link span ▁for ▁over ▁ 3 0 ▁years . ▁They ▁pione ered ▁integral ▁tank , ▁sub mer ged ▁tank , ▁and ▁mobile ▁link sp ans ▁under ▁the ▁direction ▁of ▁John ▁Rose . ▁These ▁semi - bu oy ant ▁ship - to - sh ore ▁brid ges ▁minim ise ▁engineering ▁infrastr ucture ▁requirements ▁and ▁were ▁originally ▁designed ▁a ▁cheap ▁and ▁simple ▁means ▁of ▁using ▁ro - ro ▁fer ries ▁in ▁the ▁Western ▁Is les ▁of ▁Scotland , ▁but ▁later ▁found ▁wider ▁applications . ▁ ▁They ▁no ▁longer ▁trade ▁but ▁their ▁expert ise ▁was ▁acquired ▁in ▁ 2 0 0 7 ▁by ▁T TS ▁Marine , ▁who ▁are ▁developing ▁the ▁design ▁of ▁tank ▁link span ▁further . ▁ ▁References ▁ ▁Category : Comp an ies ▁of ▁Scotland ▁Category : W ater ▁transport ▁infrastr ucture ▁Category : 1 9 7 2 ▁establish ments ▁in ▁Scotland ▁Category : Man ufact uring ▁companies ▁established ▁in ▁ 1 9 7 2 ▁Category : B rit ish ▁companies ▁established ▁in ▁ 1 9 7 2 <0x0A> </s> ▁The ▁H itz acker ▁Arch ae ological ▁Centre ▁() ▁is ▁an ▁arch ae ological ▁open - air ▁museum ▁in ▁H itz acker ▁in ▁the ▁German ▁state ▁of ▁Lower ▁Sax ony . ▁The ▁core ▁theme ▁of ▁the ▁museum ▁is ▁the ▁presentation ▁of ▁Bron ze ▁Age ▁settlement s . ▁ ▁The ▁museum ▁has ▁three ▁re construct ed ▁single - room ▁houses ▁ ▁( W ohn st all hä user ) ▁or ▁long h ouses ▁( L ang hä user ) ▁that ▁combine ▁liv