After visiting the Titanic, Captain Brain and Mr. Pinky are taking the Alvin submarine back to the surface of the water. After ascending for 6 hours, they are 1396 feet below the surface of the water. Then, at 8 hours they are 1328 feet below the surface.

Write an equation to model this situation (use d\displaystyle {d} for distance in meters and h\displaystyle {h} for hours).