Mersing is base in Johor Bahru Malaysia, Johor is the third largest (19,984 sq km) and one of the most developed states in Peninsular Malaysia. It is situated at the southern tip of the peninsula, just across the Straits of Johor from Singapore (with which it is connected by a road and rail causeway). Johor's population exceeds two million people, comprising an ethnic mix of Malays, Chinese, Indians, and other groups. Its capital is Johor Bahru.