The river has been used for navigation since Roman times, and is still navigable by small boats as far as Bodiam Castle.
"Our maps are used for navigation in over 100 countries".
Graphics that are used for navigation can be replaced with their text equivalents.
Only the lower portion of the river is used for navigation of any importance.
That technology would eliminate the need for conventional radar, and for radio beacons on the ground used for navigation.
If a phone app is to be used for navigation, best to let a passenger operate it.
Canals and inland waterways, natural or artificial waterways used for navigation, crop irrigation, water supply, or drainage.
Electric organs in fish have been known since the 1770s and are variously used for navigation, communication, and, more rarely, for defense or suppression of prey.
Electronics experts say that the radio frequencies assigned to cellphones are different from those used for navigation but that cellphones may emit some radio waves at unassigned frequencies.
The captain's bridge of the "Perfectly Chilled," a 72-foot-long houseboat, isn't used for navigation all that often, mostly because the vessel is only moved for repairs.
And if the phone is being used for navigation instructions and subsequently loses its cellular connection, the turn-by-turn alerts will also disappear.
