Land Nav'
My guess would be gyros and inertial navigation system. The Navstar constellation didn't exist until the late 1980s, or at least its was not publically available until then.
The British had something in the same timeframe, and I sort of remember it mentioned in one of those slim AFVProfiles pamphlets.
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Terry Warner
- 74-????? M151A2
- 70-08876 M38A1
- 53-71233 M100CDN trailer
Beware! The Green Disease walks among us!
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