Groups can have or can be thought of as having minds in something like the sense in which individuals can have minds.
Taking the extended mind seriously as a view of individual cognition, and so rejecting individualism as a view of cognition, constitutes the basis for a more integrative treatment of memory.
Nations are perhaps the most important social group to which individuals belong.
The kind of cognitive activity necessary to successfully navigate a military naval vessel is distributed both among individuals, and between individuals and the cognitive artifacts on which they rely, the various instruments, charts, and social structures that make possible the range of cognitive tasks that must be completed.
Individual memory extends itself into shared public culture and there is, in effect, no gap between culture and mind to be bridged at all.