Campeche Bank is part of the Gulf of Mexico and extends from the Yucatan Straits in the east to the Tabasco-Campeche Basin in the west. The Campeche ocean bank is 81 mi from Mexico's geography of Campeche nautically bearing 100 nmi south of the Tropic of Cancer. Campeche Bank is cast as cays and reefs with islets encompassing Arrecife Alacran and Sigsbee Deep to the north with a southwest island arc of the Cayos Arcas archipelago isolated 92 nmi north of Ciudad del Carmen.