Pax

The Pax was a small row boat owned by Camp Jupiter and was also the only working ship in their Navy, as the Romans feared the sea. Pax is the Latin word for peace.

The Son of Neptune
Before Frank, Hazel, and Percy go on their quest to free the god Thanatos, Percy argues with Octavian about how much supplies they will get. While Octavian wants to give them none, Reyna agrees to allow them to use the full force of the Roman Navy as traveling over land is dangerous. When the three reach the docks, they come upon an old tarp with SPQR labeled on it. When they remove the tarp, they find a single row boat (without the oars) with the name Pax scrawled on the side and a set of painted sad eyes. Percy uses his power over the sea to clean the boat and propel it forward toward Alaska, and eventually asks for the help of a Killer Whale to pull them to Portland. The whale agrees and pulls them while Percy sleeps, but eventually passes the boat off to a school of sturgeons.

However, upon arriving at Seattle, the Pax gets several leaks and Percy claims that he is mostly holding it together with his will power and by the time they reach the city, it falls apart and sinks. They are forced to use alternate transportation throughout the rest of the quest.

Trivia

 * Pax is Latin for "peace".