Where is the headquarters located of the shipping company involved in the Rena oil spill?
Rena oil spill The "Rena" oil spill occurred off the coast of Tauranga in New Zealand. The spill was caused by the grounding of  on the Astrolabe Reef. The "Rena" was a container ship and cargo vessel owned by the Greek shipping company Costamare Inc., through one of its subsidiary companies, and chartered by the Mediterranean Shipping Company (MSC). The spill has been described as New Zealand's worst maritime environmental disaster.
Port of Rotterdam The Port of Rotterdam is the largest port in Europe, located in the city of Rotterdam, Netherlands. From 1962 until 2004 it was the world's busiest port, now overtaken first by Singapore and then Shanghai. In 2011, Rotterdam was the world's eleventh-largest container port in terms of twenty-foot equivalent units (TEU) handled (2009: tenth; 2008: ninth, 2006: sixth). In 2012 Rotterdam was the world's sixth-largest port in terms of annual cargo tonnage.