deep-sea

Of, related to or located in the deeper part of the sea.

The oarfish is a deep-sea fish.

At the time, international deep-sea shipping remained a loose cargo operation, although BR did seek to influence conversion to unit loads by providing a containerised short sea shipping service between Harwich and Rotterdam in 1968.

Of or related to an open sea.

deep-sea fishing

Of a port, able to accommodate the largest ships.

In addition to the long-standing relationship with Felixstowe (GBRf now carries a third of all containerised rail traffic arising from that port), operations have expanded at two other deep-sea ports - Southampton and Thames Gateway.