It seems that one of the ways of finding a Transmission Tower (and thus possibly a crashed ship) is to perform a scan in your ship while in space. This is what one Reddit user suggested:
Transmission towers and crash ships still exist, however there is no way to find them except for sheer luck in a system scan, or just fly around and see it.
Perform the scans while looking at a planet. I can't tell for sure if this matters or not, but I seem to find more locations via this method while looking at the planet I want to scan.
You can also try this method one user posted on a Steam Forum:
- Build a Signal Booster
- Select Colonial Outpost. This has the chance of finding a Transmission Tower. If you don't find one and find something else, you have to go to the waypoint found and discover the location with the save point before you can re-scan again.
- Place a Beacon at the Transmission tower once found. This will act as a place holder for you so you can return to it easily.
- Solve the puzzle in the tower and go to the crashed ship
- Repeat steps 3 and & 4. The tower should reset after traveling to the crashed ship and discovering the location using the save point. If it didn't you can go into space and go to the space station as well to reset it and then come back.
You may not be able to reuse the towers as they stated however. Other users in the post found that they could not.
A third method which was posted in the same Steam forum as above states:
...Scan the planets from space and pick the ones where you get Abandoned Building or Trading Post. Those seem to be the planets with the most buildings. Some of them have a much higher density of buildings than before the update, there are crazy numbers of towers. Then just fly over the planet at 150 clicks or so and look for towers.