Linked from
The 25 pages that link to Marine chronometer, each with the reason it gives.
LongitudeRelated: Comparing its time with local solar time gives a ship's longitude.
Marine navigationRelated: Accurate time enabled longitude calculations during ocean voyages.
HMS BeagleRelated: Accurate timekeeping helped the ship calculate longitude while surveying.
Matthew FlindersRelated: Accurate timekeeping helped Flinders fix positions along unfamiliar coasts.
KnotRelated: Reliable timekeeping made speed estimates based on timed log-line runs more useful.