
Seat belts aboard the Campbell
A seat belt was a harness designed to hold and protect a passenger of a vehicle in case of an accident or a sudden stop.
On NX-class starships following the destruction of the Xindi weapon, the captain's bridge command chair was fitted with slots for shoulder harness seat belts. (Star Trek: Enterprise fourth season)
As of 2164, twin-shoulder seat belts were featured on the bridge and in engineering aboard the Freedom-class USS Franklin. (Star Trek Beyond)
The USS Enterprise of the alternate reality featured twin-shoulder belts for times of gravity failure, though they – unlike those aboard the Franklin – were self-extending. (Star Trek Into Darkness)
Constitution-class starships were equipped with seat belts, which were employed in cases when there was a loss of gravity on the bridge. (TAS: "Once Upon a Planet")
Starfleet Type 15 shuttlepods were equipped with seat belts for all passengers. (TNG: "Power Play")
SS La Sirena had seat belts on all chairs on its bridge, for use during high-velocity atmospheric entry. (PIC: "Et in Arcadia Ego, Part 1")