But be careful about parking your bigger ships in the asteroid belt as a little carelessness can lead to a fatal collision. O.R.B. offers five separate levels of units. Each unit is ranked in terms of armor, speed, maneuver, firepower and cost. First and foremost among the ships is the space station in orbit around your home planet. Here you can build new units, research technologies and upgrade existing ship classes.
Battle cruisers come next on the list of units.
These are giant ships that are used primarily as carriers. Destroyers come third. There will also be support corvettes, escort shuttles and science vessels. The fourth group of units are commandos which are used to board and capture enemy ships. Fighters are the final class of ships.