bathosphere
An underwater vehicle built to resist pressure is called a submersible. These vehicles are designed to protect passengers and equipment from the immense pressure of deep-sea environments.
A vessel at sea is said to be underway.
Deep sea fishing fishing far out at sea is called deep sea fishing .
A waterway deep and wide enough for a vessel is called navigable.
1.Water boiling in vessel by burner flame. 2.Water currents in deep sea. 3.Generation of sea wind.Ex.Trade wind
deep sea canyons
The giant squid has often been called a sea monster.
Deep inlets out by the sea into the Scottish coast are called sea lochs. They are typically long, narrow bodies of water that are surrounded by steep cliffs or mountains.
The abyssal plain.
A vessel on the sea often refers to a ship or boat on the ocean. By definition a vessel is a craft designed for water transportation
fjord