The synchronzation systems that ships currently have to keep all public area clocks on correct times is very primitive and simple. Even with the relatively small number of ship's clocks needing synchronization, these systems rarely work very well.
There is currently no system in existence that could properly synchronize 1,000s of clocks at the same time.
Should the cruise lines invest big money to develop and install such systems? Why?
If you cannot afford a watch, we probably don't really want you sailing with us anyway.