Home/American Shipper/Rena’s stern 75% underwater American Shipper Rena’s stern 75% underwater FreightWaves Staff · Tuesday, January 10, 2012 Facebook Twitter Pinterest LinkedInThe stern of Rena has mostly submerged after the containership broke in half on Astrolabe Reef, off the coast of Tauranga, New Zealand during a storm over the weekend. Floating oil and containers are a concern.