Yup, that's called tercom (terrain contour matching), and is an alternative for GPS correction. Used for example by the Tomahawk cruise missile. Note that you s

Yup, that's called tercom (terrain contour matching), and is an alternative for GPS correction. Used for example by the Tomahawk cruise missile. Note that you still also want INS, though, cause why not. GMLRS doesn't do that. Also, Ukraine will not get Tomahawks, not even the closest ally Britain can use them without American permission.