... hearing a fog signal. The apparatus, moreover, for sounding the signal often requires some time before it is in readiness to act. A fog often creeps imperceptibly toward the land, and... Special Publications - Seite 111900Vollansicht - Über dieses Buch
| 1893 - 668 Seiten
...mentioned.) 8. Fug Signals.—Sound is conveyed in a very capricious way through the atmosphere. Apart from wind, large areas of silence have been found in different...readiness to act. A fog often creeps imperceptibly towards the land, and is not observed by the people at a lighthouse until it is upon them; whereas... | |
| Great Britain. Hydrographic Department - 1897 - 938 Seiten
...clear weather. Therefore toomuch confidence should not be felt in hearing a fog signal. Theapparatus, moreover, for sounding the signal often requires some...readiness to act. A fog often creeps imperceptibly towards the land, and is not observed by the people at a lighthouse until it is upon them ; whereas... | |
| 1900 - 580 Seiten
...mentioned.) 8. Fog Signals. — Sound is conveyed in a very capricious way through the atmosphere. Apart from wind, large areas of silence have been found in different...readiness to act. A fog often creeps imperceptibly towards the land, and is not observed by the people at a lighthouse until it is upon them ; whereas... | |
| 1911 - 684 Seiten
...different distances from the fog signal station, in some instances even "when in close proximity to it. The apparatus, moreover, for sounding the signal often...readiness to act. A fog often creeps imperceptibly towards) the land, and is not observed by the people at a station Until it is upon them ; whereas a... | |
| U.S. Coast and Geodetic Survey - 1912 - 178 Seiten
...not be felt as to hearing a fog signal. The apparatus, moreover, for sounding the signal may require some time before it is in readiness to act. A fog...imperceptibly toward the land, and is not observed by those at a lighthouse until it is upon them; whereas a vessel may have been in it for many hours while... | |
| United States. Hydrographic Office - 1915 - 590 Seiten
...the origin of sound, even in clear weather; therefore, too much confidence should not be felt as to hearing a fog signal. The apparatus, moreover, for...fog often creeps imperceptibly toward the land, and may not be observed by the lighthouse keepers until upon them; a ship may have been for many hours... | |
| United States. Hydrographic Office - 1915 - 1286 Seiten
...the origin of sound, even in clear weather; therefore, too much confidence should not be felt as to hearing a fog signal. The apparatus, moreover, for...fog often creeps imperceptibly toward the land, and may not be observed by the lighthouse keepers until upon them; a ship may have been for many hours... | |
| United States. Hydrographic Office - 1915 - 418 Seiten
...the origin of sound, even in clear weather; therefore, too much confidence should not be felt as to hearing a fog signal. The apparatus, moreover, for...fog often creeps imperceptibly toward the land, and may not be observed by the lighthouse keepers until upon them; a ship may have been for many hours... | |
| United States. Hydrographic Office - 1915 - 658 Seiten
...the origin of sound, even in clear weather; therefore, too much confidence should not be felt as to hearing a fog signal. The apparatus, moreover, for...sounding the signal often requires some time before it is in-readiness to act. A fog often creeps imperceptibly toward the land, and may not be observed by the... | |
| United States. Hydrographic Office - 1916 - 592 Seiten
...of silence have been found in different directions and at different distances from the origin of the sound, even in clear weather. Therefore too much confidence...the people at a lighthouse until it is upon them, whereas a ship may have been for many hours in it and approaching the land. In such a case no signal... | |
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