I don't remember anything about the field coming down in the docs - but I'll look again, thanks!
edit - nothing in the docs - here's the write up.
# The Robots:
Due to their very nature, the Robots are proficient with computers. They
have just found a way to establish a viral field. The field wipes the
enemy ship's computer core, erasing the ship's name, resetting the FC to
"VRF", erasing destination, warp factor and transporter info. The ship
that is caught in the viral field is effectively stopped dead in its
tracks, unable to move, beam anything up/down and even cloak. In addition,
the existing cloaking shield is no defense; Robotic viral field penetrates
the cloak. Therefore, the Cybernaut, which is the only ship equipped with
the viral field generator, can easily disable an entire enemy fleet and
cause the enemy to assemble another one as the first fleet's ships drift
helplessly in space. To activate the Viral Field, set the Cybernaut's FC
to "VRF", warp 0, and the enemy race to disable as primary enemy or mission
kill for all races. The Cybernaut loses 5% of its crew to short-circuits
as the enemy fights for control of its computers. The Cybernaut has to
have at least 100 "crew-bots" to establish the field.
The Cybernaut can neither move nor be towed if the field is to be
In order to prevent the creation of an impenetrable defense around the
Robotic empire, no 2 Cybernauts can be present within 100 ly of each other.
In this case, the Viral field will not work on both.
In order to prevent an "unreachable" Cybernaut, the device cannot be
operated from within a planet's warp well (1-3 ly).
Note: races that the Robots are allied to will not be affected by a Viral
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