It is conceptualized as the businessman or merchant in charge of denying ships (Boats) at his own risk. He is also defined as the person who, using ships whether they are leased or owned, is dedicated to the exploitation of the same. Along with this term we find the word shipowner which refers to the person who, being or not the owner, has possession of the ship, these two words are relative but they differ since according to the Spanish laws of the year 1949 the condition of being an owner between both defines who is the shipowner and who is the shipowner.

It is of great importance to make these concepts clear: owner, shipowner and shipowner.

The owner: individual legally owner of the ship, is the one who has possession of a ship or boat.
The shipowner: It is the individual in charge of assembling and leaving the ship in suitable conditions for navigation offshore, it is also the intermediary between the owner, the shipowner and the other workers of the ship, they are the ones who must be aware of each step before, during and after leaving.

Shipper: This may or may not be the owner, for the shipper it is not necessary to be the owner since he is in charge of operating the ship.

González Huebra said ¨still in relation to the C. de C. of 1829, he wrote that shipowner is the person under whose name and responsibility the expedition of the merchant ship turns, that is, the one who sends it armed, rigged and balanced, to the which is also given the name of shipowner¨.