Sea Charts are very important as they allow for faster and less dangerous navigation in a region. As making good charts takes considerable time and investment, most gamers will be looking to purchase them for the seas in which they sail. Creating and trading these charts can earn a good living and create a great opportunity for a life of exploration.
Much of the time in Rulers of the Sea is spent at sea. As a Captain, sailing is as much preparation as it is the running of a floating machine. Every cog in that machine, from crew member to timber, will be well known by the Captain, and something the Captain will want to protect from the perils of the sea.