82 miles from Patong Bay
Ban Pak Chok is an all-weather anchorage lying inside an inland waterway protected from the sea by Koh Ra. Entrance from the north is easy, with deep water close to Koh Ra. Coming from the south you must navigate the channel with care. This is especially so near the small rock mid-channel, passing to the south of the obstruction. Anchor in 6-10 metres on a muddy bottom just east of the non-navigable channel between Koh Phra Thong and Koh Ra.
About half a mile from the anchorage, look for a village with a jetty that dries at low tide.