The engines on the ATV face opposite directions enabling The Squirt to accelerate and decelerate without having to rotate. It has very good control forward and back, but moving side to side introduces rotation. This is manageable because the docking ports are located on the front and back limiting the need for side to side motion.
One ATV can also be detached and used as a shuttle to transport cargo to stations. This eliminates the possibility of The Squirt's momentum bumping the station out of position when docking.
After construction, The Squirt was quickly put into service delivering water to several stations where the Oxygen gardens were beginning to turn brown from a drought.
