Crossing, in a nautical context, is the act or process of a vessel navigating from one geographical location to another over a substantial body of water. This usually involves a planned route or pathway that is carefully navigated to safely traverse the water body. It could be a short, direct journey over a river or canal, or a long distance voyage across an ocean or sea. It involves careful considerations of factors such as water currents, tides, weather conditions, sea traffic, and the vessel's capabilities to ensure a successful, safe, and efficient transition from departure point to the destination.

1. The Titanic crossing the Atlantic Ocean on its maiden voyage from England to New York in 1912. 2. Christopher Columbus crossing the Atlantic in 1492 as he journeyed from Spain to the New World. 3. The Mayflower crossing the Atlantic Ocean in 1620, carrying pilgrims from England to the Eastern North American coast. 4. Modern cruise ships regularly crossing the Caribbean Sea as part of vacation packages, from Florida to various islands. 5. Ferries crossing the English Channel daily, transporting passengers and vehicles between the United Kingdom and France.

The fun fact here is about the fascinating maritime tradition and law called "The Law of the Sea." This common heritage of mankind states that the part of the sea that is 200 nautical miles from the shore is considered international waters. When a vessel is crossing a vast body of water from one location to another, as soon it is 200 nautical miles away from the shore, it technically enters a no man's land. That means the ship is under the jurisdiction of the country whose flag it's flying, not any local or regional authority. This tradition can date back to Ancient Greek and Roman times, when different nations live harmoniously with the law at sea. Yet, modern definition and law were only formed in the 20th century. So next time you're on a cruise, remember that once you're 200 nautical miles out at sea, you're in a floating piece of your country!