Statements (19)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Sound signaling device
|
| gptkbp:audible_in |
Foggy conditions
|
| gptkbp:emits |
Loud sound
|
| https://www.w3.org/2000/01/rdf-schema#label |
Foghorns
|
| gptkbp:inventedBy |
19th century
|
| gptkbp:locatedIn |
Lighthouses
Buoys Coastal stations |
| gptkbp:produces |
Low-frequency sound
|
| gptkbp:provides |
gptkb:Steam
Electricity Compressed air |
| gptkbp:purpose |
Prevent maritime collisions
|
| gptkbp:regulates |
gptkb:International_Maritime_Organization
|
| gptkbp:replacedBy |
Electronic sound signals
|
| gptkbp:used_in |
Maritime navigation
|
| gptkbp:usedFor |
Warning ships in fog
|
| gptkbp:bfsParent |
gptkb:Arthur_Dove
|
| gptkbp:bfsLayer |
6
|