Pontoon bridge a pontoon bridge to cross the Bosphorus and Emperor Caligula built a bridge at Baiae in 37 AD. For Emperor Darius I The Great of Persia (522–485 BC), the Greek Mandrocles of Samos once engineered a pontoon bridge that stretched across the Bosporus, linking Asia to Europe, so that Darius could pursue the fleeing Scythians as well as move his army into position in the Balkans to overwhelm Macedon. Other spectacular pontoon bridges were Xerxes' Pontoon Bridges across the Hellespont by Xerxes I in 480 BC to transport his huge army into Europe: According to John Hale's "Lords of the
GSL-class berthing pontoon intended for berthing vessels having displacement up to 40,000 tons on a jetty by serving as spacers between the jetty and the ship. They were built as part of an order to also construct one Service Barge Pontoon and four gangways. The request for proposal was issued on 7 March 2011 and the contract was signed on June 2011. By February 2013 all four pontoons had been delivered. Two pontoons were stationed at Naval Dockyard, Mumbai and two at the Naval Base in Karwar. GSL service barge pontoon GSL-class berthing pontoon The GSL class of jetty berthing pontoons are a