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HIGH & MEDIUM FREQUENCY NAVIGATION SYSTEMS
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Coast-Geodetic-Survey
Nautical Charting
Navigation
High & Medium Frequency Navigation Systems
Navigation
Shoran equipped launch in the Beaufort Sea.Launch operating with the Arctic Field Party
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Inshore sextant fix hydrography as out of line-of-sight of Shoran.Launch off of EXPLORER
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(464.24 KB)
Shoran station Stem.Installed by party off of EXPLORER
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Shoran installation at Port Clarence.
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Diagram of range-range navigation geometry.Hydrographic Manual
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Erecting EPI (Electronic Position Indicator) antenna.EPI was a medium frequency system that was useable out to 200 miles.Invented within the Coast and Geodetic Survey
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EPI antenna mast used in Bering Sea operations.
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Carl Aslakson monitoring EPI receiver on HYDROGRAPHER.Field testing of EPI - first medium frequency survey navigation system.Invented within the Coast and Geodetic Survey
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First field testing of Raydist on the SOSBEE.Medium frequency survey navigation system
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Raydist watch on the HYDROGRAPHER.Hydrographic surveying operations
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Electronic survey equipment on HYDROGRAPHER.Field testing of electronic survey equipment
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Setting up a Raydist tower.Base plate with tower and cable - tower assembled from 10-foot aluminum sections. Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #1 of sequence
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Setting up a Raydist tower.Preparing the gin pole - basically a large lever arm.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #2 of sequence
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Setting up a Raydist tower.Ready to erect tower.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #3 of sequence
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Setting up a Raydist tower.Lifted a little.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #4 of sequence
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Setting up a Raydist tower.About half-way up.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #5 of sequence
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Setting up a Raydist tower.Most of the way up.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #6 of sequence
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Setting up a Raydist tower.Tower in position and ready to transmit.Party off of wire drag vessels WAINWRIGHT and HILGARD.Photograph #7 of sequence
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(543.2 KB)
Erecting a 100-foot Raydist tower with a 30-foot gin pole.Party off of PATHFINDER
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(321.07 KB)
NOAA helicopter supporting Raydist tower installation.Party off of SURVEYOR
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(279.71 KB)
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