 Whether a divide is considered a continental divide distinguished from other secondary drainage divides may depend on whether the associated gulfs, seas, or oceans are considered separate.For example, the Gulf of Mexico is considered separate from the Atlantic Ocean, so the Eastern Continental Divide separates their respective watersheds.But the Sea of Cortez is usually not considered separate from the Pacific Ocean, so the divide between the Colorado River watershed which drains to the Sea of Cortez, and Columbia River Watershed which drains to the Pacific Ocean, is not considered to be a continental divide.