All hypothesis are on the table, im just not so sure we can infer from the reported size that
There are a number of explanations for the size that could have nothing to do whatsoever with Us.
Massive biospheres for cosmic gypsy's is just one alternative.
The larger ships may contain the "warp drive", which may interfere with or be interfered with by the gravity well of objects like planets, Thus needing sub light ferrys for the ground work.
Indeed drives that use massive gravity well projectors to warp space, would also perhaps produce compressed time as a byproduct.
Once a ship that size gets caught in the gravity well of a planet, it would take energy to free it, thus it makes sense to weigh anchor offshore and let the smaller craft play the role in planetary exploration.
Im a huge fan of the Battletech franchise and in the novels you have jumpships and dropships, the jumpships carry the Drive system that allows them to jump from system to system, while carrying a complement of drop ships which can only ferry between the planet and jumpship.
The setup Mr Stanford describes may simply be a reflection of the practicalitys of long distance space flight, and bear no relation to us or their agenda here
"Whoever is mounting this significant effort has a definite goal in mind other than the mere operation of these devices." Meaning the machines are just the means to some end. To me, large and numerous vehicles says, "They come here to get something physical
There are a number of explanations for the size that could have nothing to do whatsoever with Us.
Massive biospheres for cosmic gypsy's is just one alternative.
The larger ships may contain the "warp drive", which may interfere with or be interfered with by the gravity well of objects like planets, Thus needing sub light ferrys for the ground work.
Indeed drives that use massive gravity well projectors to warp space, would also perhaps produce compressed time as a byproduct.
Once a ship that size gets caught in the gravity well of a planet, it would take energy to free it, thus it makes sense to weigh anchor offshore and let the smaller craft play the role in planetary exploration.
Im a huge fan of the Battletech franchise and in the novels you have jumpships and dropships, the jumpships carry the Drive system that allows them to jump from system to system, while carrying a complement of drop ships which can only ferry between the planet and jumpship.
The setup Mr Stanford describes may simply be a reflection of the practicalitys of long distance space flight, and bear no relation to us or their agenda here