Aircraft carrier size, low flying, slow moving mechanical object, engine like thrumming sound, small "running" lights.

Unidentified Flying Object June, 1979 Woodstock, VT  Sighting shared by 6 + individuals.
Description:  Foggy afternoon, 3 or 4pm.  Heard shouting from outside dorm at Woodstock Country School, went outside to see what was up.  Everyone pointing up and shouting.
Through the low-lying fog (school was located in a shallow valley) I saw what appeared to be a huge overhead mechanical slow flying object 300-500 ft (?) over head making a deep “thrumming” sound with many small lights.  Passing overhead from North to South.
Because of fog, it was hard to determine edges, the above description could only be seen from directly over head.  Hard to determine length of time of object passing above, but seems to have been several minutes given the time from hearing shouting, going down 3 floors and witnessing the above from middle of open field.
It sounded like a freighter going by at close range and a similar speed.  Felt response was like being in a row boat as the overhanging deck of an aircraft carrier went over me.
Witness indicates that the date of the event is approximate.  PD