The GIUK Gap is presented as NATO's secondary barrier behind a desired forward fight in the Norwegian and Barents seas. Iceland, Greenland, Britain, Norway, and fixed acoustic surveillance make the gap a layered detection zone rather than a single line on a map. On the other side, fixed sensors and defenses protect Soviet SSBN operating areas. Those bastions create a strategic pull that competes with any campaign against Atlantic shipping because the Soviet Union cannot casually leave its nuclear deterrent exposed.
Chapter · 19:43-31:31
The GIUK Gap and the Soviet bastion problem
A geographic overview connects NATO's GIUK surveillance barrier with the Soviet need to protect ballistic-missile submarines in northern bastions.