Work In Progress #3 - A Front View of the ORCA-12 With Deep Space Engines Attached
The ORCA-12 was designed to be a very multi-use space and atmosphere capable vehicle.

While the ORCA-12 by itself has separate engines for space and atmospheric travel, long distance journeys require these Deep Space Engines that are only useful in outer space.

The engines are a very large version of the ion drives built into the ORCA-12. These engines allow the ORCA-12 to travel much faster and farther than without them.