A 20km paddle from Brodick on Arran round Holy Island, March 2010.The north going flood tide enters Lamlash Bay by the South channel and exits by the North Channel the south going ebb tide runs in the reverse direction.N going flood +0605 HW Greenock -0500 HW Dover, 1knt springs S channel 0.75knt N channelS going ebb +0040 HW Greenock +0200 HW Dover, 1.5 knt springs S channel 1 knt N