Assertion: omega | /r/CapableOf | enable ship
Facets:
value: to determine their position
type: PURPOSE
Source sentences:
text: It was a hyperbolic navigation system, enabling ships and aircraft to determine their position by receiving very low frequency (VLF) radio signals in the range 10 to 14 kHz, transmitted by a network of fixed terrestrial radio beacons, using a navigation receiver unit.