Route, where it's unencumbered by the ports' unwillingness to accommodate nuclear ships, a problem that made other nuclear cargo vessels impractical. Economic impact At the time of its invention, the system was considered by experts to be a considerable advancement in shipping technology. LASH carriers were able to transport five times more cargo than a comparable conventional transport ship, the loading and unloading process was much more efficient, and a lack of harbor equipment or quay moorings provided no obstacle, as the lighters could be loaded directly onto the ship. The system also relieved the pressure to unload as quickly as possible, since the lighters already in the water could be moved while others were being unloaded. All told, these ships spent more than 80% of their annual application time at sea, whereas the conventional ships often lay at harbor for as much as half the year. Problems and shortcomings New problems which were as yet unknown to shipping companies arose with the advent of the LASH system and similar barge carriers. Aboard the carrier ship, the lighter is simply a large cargo container, but in the seaport and on the inland waterways it becomes a vessel. As a vessel, they are subject to requirements for equipment regulations like anchors, winches, coupling had to be provided so-called "head barges" which could not be transported on the carrier ships. Also, serving waterways which freeze over in winter required a high capital expenditure. Studies showed that the costs of addressing these issues, along with the costs of operating the carrier ships and their lighters, were much higher than for the customary freighter ships or the ISO-compliant container ships that were beginning to conquer the transportation market. While barge carriers and lighters are a technologically interesting sea transport system, they are economic only under certain specific conditions of traffic and economy. Preservation On 15 December 2007, Rhine Forest, ex-Bilderdijk of the Holland-Amerika Line, entered the Port of Rotterdam for the last time, prior to being withdrawn from service because of low utilization on the New Orleans/Rotterdam route. It is a sister ship of . The LASH lighter with registration p. CG 6013 was donated to De Binnenvaart, an inland-shipping museum in Dordrecht, where it is now part of an exhibit. Designs LASH LASH barges are loaded at inland river and shallow ports. Then, the barges are towed to ocean port's fleeting areas to