Emergency hatch
The emergency hatch was a hatch found on the bridges of starships that was used to escape in the case of an emergency. 

The crew of the  used the escape hatch on the bridge of the  after the Klingon Bird-of-Prey crashed into San Francisco Bay in 2286. ()

While under the influence of the polywater intoxication, the bridge crew of the  released the emergency hatch of their ship, subsequently blowing them out into space, and to their deaths. ()

After the  crash landed on the surface of a penal moon located 0.35 light years from the Idran system terminus, the occupants used an emergency hatch on the top of the runabout to exit. ()

de:Notausstiegsluke
Spacecraft components