The series contains official letters from the mid-18th century to the early 19th century sent by the Maritime Office to consuls and representatives of the Dubrovnik Republic in Italian, Ottoman, African, Spanish, and Portuguese ports. Due to a new increase of maritime affairs in the Republic at that time, the Republic of Dubrovnik had established about 80 consular offices in these ports. The series also contains circular letters and instructions to Ragusan sea captains, to all consuls of the Republic, and specifically to all consuls in the Ottoman Empire and to all consuls in the countries in the Western Mediterranean parts of Europe.

The series contains a small number of letters sent to Jewish people by the officials of the Maritime Office. Among those people, in the second half of the 18th century, there are references to the administrators of the consulates of the Dubrovnik Republic in Algeria, Abram and Raphael Jacob Bussara, (e.g., vol. 8, f. 3). There is also another reference to Abram Aruch, who was responsible for Ragusan ships in Alexandria at the time when there was no Dubrovnik consul in the city (vol. 1, f. 110).