...... GPS has changed travel a good bit for us I think. I often wonder how I got around before that. I can recall my first time flying a Cessna with my friend who had a portable GPS with him, it seemed like cheating it was so simple. Navigation in a plane before that was interesting.
it's hard to imagine but it was over 20 years ago, now... a highly capable team with mature operators/technicians were entering Fallujah and started taking small arms fire, and then mortars... the CoC was in direct comms with them and had real time video feed from a high altitude drone, and all the way from As Sayliyah- which was was in Doha, Qatar... I thought, at the time, it was incredible such a thing was possible. The team finds cover and are trying to perform a inter-section/re-section, which is using your known position (after the intersection) and the position of a prominent terrain feature on the map(also known position) and shoot/collect an azimuth to the unknown position to determine it's position... it's usually reported in grid format- six digit, eight digit, etc...
they were taking a really long time to do this... the chief started barking at them to "hurry the eff up" and "cough up those digits" and so some fire support could be lobbed in there. ... again, they lagged.
finally, they reported "the batteries are dead and we don't have any extras that aren't dead too", which globally reduced that team from 'highly capable' to 'wtf' in everyone's mind simultaneously... the chief said "eff that tracker, break out a dang map, compass, and protractor!".... more lag... by this time some industrious technician in the CoC had already done his own map recon and pegged the target area... the Chief, not yet knowing that, sends "Well?!".... the response: "we don't have a protractor and nobody here knows how to do it, anyway"....
it wasn't ten years prior to that i'm in a non-permissive environment myself, creeping around with five other dudes, and sending out SALUTE reports... we had a high tech star wars super gadget called a GPS... it was the size of a big city's phone book with a separate antenna, and had a small screen about the size of one found on a standard pager at the time that would give us our (its) location... when it worked... and when we had time to convert the data to usable format which took some math, effort, and time- which are things you don't want to trust your average Marine with... and while using the equally star-trek radio at the time, a PRC-128, getting barked at for 'not' using that GPS 'thing'... we had several maps, instead.... and several protractors... and everyone had a compass.
nowadays? those guys operate with a dang air tag. well, basically. all they have to do is look down to see where they are, and point to see where 'they' are.... until the batteries die.