I'm interested in purchasing a new smart watch.  These watches obtain their 'time' from being bluetooth connected to your smartphone (e.g. iPhone, Android such as Samsung) which its time is phone network feed.


If on a voyage (especially a relocation cruise) no land based phone network available to feed 'time' signal to smartphone and then by default to smart watch.  Your watch will retain last synced time and will not adjust as the ship cruises into and through timezones.  The time will be next updated once connection to a land phone network reestablished.


Do mobile phones at sea obtain a time signal from ships 'maritime cell network' which would be satellite feed?  If so, I assume no charge and only a charge if you make a phone call and/or send a SMS text.


Can anyone assist here!