Class 2 claustrophobia was a name given by Starfleet Cadets to class 2 shuttles, as many Cadets were placed into them for shuttle training at Starfleet Academy.

In 2375, Tom Paris referred to this term while flying in a class 2 shuttle in the Delta Quadrant, while near a volatile proto-nebula, with The Doctor, B'Elanna Torres and Seven of Nine inside the shuttle. (VOY: "Drone")