Ovinomancer
No flips for you!
Re:Astrogation in Star Wars
This actually answers both why they had to have a map in TFA (instead of just final coordinates) AND why the 'hyper ahead of the fleeing Resistance ships and pincer them" didn't work.
So, as established in Ep 4, hyperdrive in Star Wars isn't a simple entering of coordinates. It's not just needing to know the destination, but also the path, because ships in Star Wars don't go into a hyperspace dimension, but instead are just going really fast through normal space. If there's a mass in the way, they get torn apart. Han sets this up in Ep 4 with Luke about how hard it is to jump to lightspeed without hitting a sun. So, to make a good jump, you have to know not only where you are and where you're going, exactingly, but also what path you're taking to get there. The path between systems is usually well known, having been previously plotted painstakingly by scouts, often millenia ago. The Rebellion (and, assumingly the Resistance) had 'secret' jump paths to out of the way locations that made it hard to follow them -- you might know where they went, but you also didn't know how they got there from here and you might have to go around a few jumps on pathways you knew. It's also why the Unexplored Regions are so, well, unexplored -- safe jump lanes haven't been scouted yet.
This is what makes the hyperdrive tracker such a huge deal -- it allows a pursuit ship to not only track where you went, but also the path you took to get there.
So, to wrap back around, this is why they needed the map in TFA -- they might know which system Skywalker was in, but they didn't know how to get there. And, it's why it wasn't useful to attempt a blind or unscouted short jump ahead to cut off the Resistance when you could just wait out the stern chase until the inevitable happened.
Now, all of that said, it was a HUGE failing in the movie to not reinforce this -- adding a few lines of dialogue to the Finn/Rose technobabble scene discussing the tracker would have been a perfect moment to do so.
In fact, to take that last a bit further, most of the issues with this movie could have been solved by just expanding the scope of a few scenes to show that things are bigger or remind folks about how things work in Star Wars. The issue with the 1st Order seeming to be so small could have been easily rectified by using Stormtroopers in place of the guards on the casino planet, and having the quick scenes where the guards play cards or talk to residents be a bit more fraught with tension about their presence/imposing order. That simple switch would have set the fact that the 1st Order was running the show and not just the handful of ships onscreen soooo much better. I understand why the scriptwriters and director missed this -- they know how big the 1st Order is -- but they should have stepped back and checked to make sure that their understanding was properly passed on in the movie.
Really, the lack of scope for so many things was the big fail for me in a movie I otherwise adored. Even space Leia would have been helped a great deal by one of the people watching her fly back calling out 'She's doing it again! Get the door!" That would, with very little effort, establish that Leia had been doing silly forcy survival things for awhile, and helped save that scene.
This actually answers both why they had to have a map in TFA (instead of just final coordinates) AND why the 'hyper ahead of the fleeing Resistance ships and pincer them" didn't work.
So, as established in Ep 4, hyperdrive in Star Wars isn't a simple entering of coordinates. It's not just needing to know the destination, but also the path, because ships in Star Wars don't go into a hyperspace dimension, but instead are just going really fast through normal space. If there's a mass in the way, they get torn apart. Han sets this up in Ep 4 with Luke about how hard it is to jump to lightspeed without hitting a sun. So, to make a good jump, you have to know not only where you are and where you're going, exactingly, but also what path you're taking to get there. The path between systems is usually well known, having been previously plotted painstakingly by scouts, often millenia ago. The Rebellion (and, assumingly the Resistance) had 'secret' jump paths to out of the way locations that made it hard to follow them -- you might know where they went, but you also didn't know how they got there from here and you might have to go around a few jumps on pathways you knew. It's also why the Unexplored Regions are so, well, unexplored -- safe jump lanes haven't been scouted yet.
This is what makes the hyperdrive tracker such a huge deal -- it allows a pursuit ship to not only track where you went, but also the path you took to get there.
So, to wrap back around, this is why they needed the map in TFA -- they might know which system Skywalker was in, but they didn't know how to get there. And, it's why it wasn't useful to attempt a blind or unscouted short jump ahead to cut off the Resistance when you could just wait out the stern chase until the inevitable happened.
Now, all of that said, it was a HUGE failing in the movie to not reinforce this -- adding a few lines of dialogue to the Finn/Rose technobabble scene discussing the tracker would have been a perfect moment to do so.
In fact, to take that last a bit further, most of the issues with this movie could have been solved by just expanding the scope of a few scenes to show that things are bigger or remind folks about how things work in Star Wars. The issue with the 1st Order seeming to be so small could have been easily rectified by using Stormtroopers in place of the guards on the casino planet, and having the quick scenes where the guards play cards or talk to residents be a bit more fraught with tension about their presence/imposing order. That simple switch would have set the fact that the 1st Order was running the show and not just the handful of ships onscreen soooo much better. I understand why the scriptwriters and director missed this -- they know how big the 1st Order is -- but they should have stepped back and checked to make sure that their understanding was properly passed on in the movie.
Really, the lack of scope for so many things was the big fail for me in a movie I otherwise adored. Even space Leia would have been helped a great deal by one of the people watching her fly back calling out 'She's doing it again! Get the door!" That would, with very little effort, establish that Leia had been doing silly forcy survival things for awhile, and helped save that scene.