Celestial is battery free and EMP proof.
Thatīs only true, when you use a mechanical watch. Quartz watches with solar panels at least are not so dependend on batterie (6 month reserve without light and 10 years of service life should cover most scenarios).
The Navy should also reinstall their HF Transceivers as well.
It might be a good idea to do it while there still are plenty of competent operators around.