Board Thread:Lore Discussion/@comment-25296253-20140818232417/@comment-24376253-20140824122814

There have been Naval Battles between Cyrodiil and Summerset so it's safe to assume they still have navies, especially after what we see in Oblivion. Skyrim was originally colonised by a fleet of ships used by the Companions, so they might still ahve a remnant navy around, but probably not that large, plus G. Tullius told us about using Skyrim ships to ferry troops from Solitude to Dawnstar.