Australian Broadcasting Corporation: Rising Tide, a group fighting the causes of climate change, says it plans to block Newcastle Harbour again next year after staging what it describes as a successful protest at the weekend. A convoy of 60 kayaks, rafts and boats formed a blockade across the entrance to the harbour yesterday to stop coal ships entering or leaving. Newcastle Port Corporation says the six hour protest did not interrupt ship movements, with several ships loaded during the day. But Rising Tide …