The Megaships of Vavatch Orbital were large naval vessels that sailed the Circlesea. Megaships were many kilometres in length, took years to work up to full speed, and took 40 years to circumnavigate the Circlesea. Full-sized liners were used for excursions and also as tenders. Aircraft were also attached. Megaships were equipped with bow lasers. These were used to clear icebergs and floatweed islands, possibly larger than the ship, which the ship could not manoeuvre around.