Cutter Suction Dredger 500 "Senagua" As a sister vessel of the 'La Esperanza', the CSD500 'Senagua', has been delivered in June 2010 by Astinave and Damen to end-user Senagua. Its first project was a siltation job - deepening the river and keeping the feet of the locals dry. View the CSD 500 Virtual Tour Download Product SheetSee all deliveries