Raglan, New Zealand low-tide area of , 2–4 m tidal range, with a spring-tide range of 2.8 m and neap 1.8 m, spring tide flow around 46 x 10 m and neap 29 x 10 m. A 2005 survey said on average water stays in the harbour 1.1 days at spring-tides, but a 2015 study showed a median residence time for whole estuary of 39.4 days with median river flows, ranging between 18 and 45 days. It is the northernmost of three large inlets in the Waikato coast (the others, also drowned river valleys, are Aotea Harbour and Kawhia Harbour). 15 significant rivers
International Convention Relating to Intervention on the High Seas in Cases of Oil Pollution Casualties International Convention Relating to Intervention on the High Seas in Cases of Oil Pollution Casualties International Convention Relating to Intervention on the High Seas in Cases of Oil Pollution Casualties 1969 (INTERVENTION 1969) is an international maritime convention affirming the right of a coastal State to "take such measures on the high seas as may be necessary to prevent, mitigate or eliminate grave and imminent danger to their coastline or related interests from pollution or threat of pollution of the sea by oil, following upon a maritime casualty or acts related to such a casualty". The 1967 Torrey Canyon disaster