Everyone trundles down the hallway, which is about 2.5 meters wide, and 3 meters tall. (about 8 feet wide, 10 feet tall). It is quite well lit, with white glowing panels in the ceiling, although occasionally there is one that is burnt out or dim. The floor is quite dusty, you can clearly see the footprints of where Zaras, the Medic and the robot were walking earlier.
After you have travelled about 300 meters, you can see that the corridor opens up into a wider area.
You are currently about 50 meters away from that area and can't see much into it yet.
The corridor is wide enough that you can travel side by side, the order that you currently seem to be in is:
Dutch is in the lead, followed by Reegus and Gustav, then Phill and Prescott and finally Toulann and Dr. Gribble taking up the rear and providing support to the others either medically, violently or sarcastically.
Still need to know if you closed the airlock doors behind you or not. I will assume that you closed both doors of the airlock unless posted otherwise. That would normally be the standard safety procedure.