A deep sea vessel. Examples: Alivin and Jason.
bathosphere
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.
The abyssal plain.
firths
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