Never heard the terms dock 1 and 2 to refer to EIT

Never heard the terms dock 1 and 2 to refer to EIT terminal but previous post explains what I think is going on-will have to take a closer look at pics

Here we see the covers for the  5 ship holds raised vertical to allow loading of ore into holds-as we've seen in previous pics ,when ship is in transit the covers lay flat over the holds-at least I think thats the case in rushing thru this