Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:smartphone
|
| gptkbp:alternativeName |
fog signal
|
| gptkbp:emits |
low frequency sound
|
| gptkbp:foundIn |
lighthouses
ships buoys |
| https://www.w3.org/2000/01/rdf-schema#label |
Foghorn
|
| gptkbp:introducedIn |
19th century
|
| gptkbp:inventedBy |
gptkb:Robert_Foulis
|
| gptkbp:operatedBy |
electricity
steam compressed air |
| gptkbp:regulates |
gptkb:International_Regulations_for_Preventing_Collisions_at_Sea_(COLREGs)
|
| gptkbp:usedFor |
producing loud warning sound
warn ships of hazards |
| gptkbp:usedIn |
maritime navigation
|
| gptkbp:bfsParent |
gptkb:Judy_Collins_Sings_the_Songs_of_Eric_Andersen
|
| gptkbp:bfsLayer |
6
|