It can dive deeper than any other manned vehicle in the world and is quite well equipped.
Other attempts have been made, with limited success, to produce manned vehicles based on the flying saucer design.
They were designed to replace several manned vehicles with a single automated one, controlled from a central operating station.
Normally each of these steps required a separate, manned, vehicle.
"We're safer to assume a manned vehicle," interrupted the President.
The robots could take the most dangerous positions and provide support whenever the manned vehicles enter a combat situation.
"From what I read in the book, that should be some sort of entrance for people or at least manned vehicles."
The development of the 53% scale DP-1 aircraft was originally funded as a manned vehicle.
The disclosure appeared to be an attempt to address health concerns about using a radioactive material in a manned vehicle.
The Shadow's cab climbed halfway over the one ahead, bashing the entire back of the manned vehicle.