21 miles from Ao Chalong
This is a good lunch destination from Koh Racha Yai in the northeast monsoon. Look for a deep water anchorage in 10-20 metres close to the small gap in the island; passage through this gap in a dinghy should only be attempted at high tide.
There is good diving and snorkelling along the shores on a mainly rocky bottom. Bottom fishing and trolling around Racha Noi is good.