At the Eastern entrance of Johore Strait, the boundary shall be held to pass through the centre of the deep-water channel between the mainland of Johore, westward of Johore Hill, and Pulau Tekong Besar, next through the centre of the deep-water channel between Johore Shoal and the mainland of Johore, southward of Johore Hill, and finally turning southward, to intersect the 3 miles limit drawn from the low water mark of the mainland of Johore in a position bearing 192 degrees from Tanjong Sitapa."