Shipping by doubt has formed a major part of trade over the centuries, and it can be boldly said that trade by sea is several thousand years old. This description has a special effect, the necessity of the existence and survival of modern ships with special facilities. Of course, building a ship and also rescuing it from emergencies and the possibility of continuing the voyage in critical situations in many cases does not seem possible except by obtaining large loans from large financial institutions. On the other hand, such institutions and banks to obtain Ensuring the repayment of loans granted along with their fees requires reliable collateral, most of which will be the ship in question or, in exceptional cases, cargo and freight, which is referred to as a mortgage. The purpose of this article is to investigate the mortgage of sea vessels in notaries, the research method is descriptive-analytical. Maritime mortgage, like civil mortgage, is summarized in creating collateral for the mortgagor in relation to the mortgaged property, but based on the specific requirements of the maritime transport industry and with regard to maritime custom, different provisions regarding the general rules of civil mortgage in this area are considered. The most important of them are: no need to collect the mortgaged property, the obligation to officially register the mortgage documents, the acceptance of the mortgage credit of freight (which is inherently an example of mortgage debt) and also the possibility of concluding a mortgage by someone other than the owner (Ship Commander).