Minefields

Only used in wartime.

• 2 perimeters 100km from shore, spaced 4km apart
  
• 20m staggered outlying section, 75km from shore
  
• 55m staggered middle section, 50km from shore
  
• 100m staggered inside section, >25 from shore

Perimeter Detection Outposts

PDOs were developed in the 2010-2015 era as a way to counter the rise of stealthed aircraft. These stations play the part of sensor nodes, each with a cluster of low-frequency bistatic radar stations scattered about in a full-coverage pattern: bistatic radars differ from traditional monostatic radars, which mount the receiver and transmitter in the same place, in that the setup splits the transmitter and receiver so that "bounced" radar signals will return to another place covered by a receiver.

Note: Pushistymistan also uses a network of OTH radars, conventional turbulence-detecting civilian weather radars, satellite-based inverted synthetic-aperture radar (ISAR) and LIDAR tracking systems--all networked into a multi-tiered system that is tied into the main computers at the Octagon.

The Octagon