<p><br /> The South Korean coast guard has released a video of rescue operations in a ship disaster where 46 sailors are still missing.<br /> </p><p><br /> The video was shot on Friday when the Cheonan went down off the west coast of the peninsula, near the disputed Yellow Sea border.<br /> </p><p><br /> The South Korean military hinted that chances for survival were slim, as the ship may only be able to contain oxygen for less than four days.<br /> </p><p><br /> Families have requested military officials for more action. They are hoping for a miracle and have gathered at a military base in Pyeontaek where they awaited news on their missing kin.<br /> </p><p><br /> The reasons why the ship sank remain unclear.<br /> </p><p><br /> An investigation is underway after reports of an explosion. South Korea have ruled out any involvement from North Korea.<br /> </p>
