The Markovian Sea was located in the northern hemisphere of Safehold, and was bound by the Passage of Storms to the North, Hammer Island to the East, and East Haven (the Republic of Siddarmark) to the west and south. It was part of the main sea route from the Temple Lands to the rest of the planet, via the east. (OAR)

In the Year of God 893, and for some time thereafter, the Markovian Sea was used by the Kingdom of Charis to harrass and interdict Church shipping. (BHD)