A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying goods or passengers, or in support of specialized missions, such as defense, research, and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity, and tradition.
I doubt this is a good place to dive. Even without the river pollution, the bottom is muddy and the water is full of silt. If anyone knows anything different, let me know.