08-Jun-2009 -- In summer of 2009 my old female friend Anti from Tonga Island visited the small islet named Tau. It is located 15 kilometers northeast of Tongatapu.
Tau Island is only 2.3 km south of the confluence point S21° E 175°. This is the only one CP worldwide located on a coral reef. The point is nearly inaccessible. On high tide it's to dangerous to use a boat and on low tide you can't walk over the corals.
May be some one will use a helicopter in the future to reach the point. ;-)
On the picture you can see the CP 2.3 km far in the north.