Ship-king was a title of dubious formality which applied to any one of these four successive Kings of Gondor: * Falastur * Eärnil I * Ciryandil * Hyarmendacil I The title referred to the main preoccupation of their bearers: the rapid expansion of the Gondorian navy. From TA 830 to TA 1149, these kings worked hard at, and were largely successful at, adding territory to Gondor with their increasingly superior naval might. The Ship-kings pushed the boundaries of Gondor to the south and to the west, such that Gondor came to include land down to the Mouths of Anduin and Umbar and even south of the River Harnen. Indeed, it was under the Ship-kings that Gondor achieved the zenith of its influence, at least until the coming of Aragorn and the Reunited Kingdom.