AT SEA RENA CARGO SHIP OIL SPILLA handout photograph released by Maritime New Zealand showing darker patches , or slugs of oil , seen in a natural collection point on the lee side of the grounded cargo ship Rena on the Astrolabe Reef , Mt Maunganui , New Zealand , 04 December 2011 . A small amount of oil has leaked from the ship Rena , which has been grounded since 05 October 2011 , as it is being pounded by rough seas off the coast of Tauranga . EPA / MARITIME NEW ZEALAND / HANDOUT AUSTRALIA AND NEW ZEALAND OUT HANDOUT EDITORIAL USE ONLY / NO SALES < 연합뉴스 모바일 앱 다운 받 기 > < 포토 매거진 >< 저작권자 ( c ) 연합뉴스 . 무단 전재 - 재배 포금 지 . >