The remote Bangladeshi island of Thengar Char disappears completely under several feet of water at high tide, and has no roads or flood defenses.But that hasn't stopped the government from proposing to relocate thousands of Rohingya refugees living in camps in the southeastern district of Cox's Bazar which borders Myanmar to its marshy shores.Bangladesh said last month it was looking to move the around 32,000 registered refugees, in part because they were hampering tourism in the coastal resort district, home to the world's longest unbroken beach.