Archive for the ‘safety’ Category

Loran-C Shut Down After More Than 67 years

Tuesday, February 9th, 2010

Crews at the Coast Guard Long Range Aids to Navigation stations, including the six Alaska-based stations, turned off their domestic signal across the nation at 11 a.m. Monday, February 8, 2010.

The shutdown of the signal concludes the broadcast of the U.S. domestic signal. Stations Attu and Shoal Cove, which are bound by bi-lateral agreements with Russia and Canada, will continue to broadcast their international signals until later this year. All the stations will continue to be maintained and manned as the closure of the facilities proceeds over the coming months. Decommissioning dates have yet to be set and plans for the dismantlement of the stations are in development.

Loran-C was originally developed to provide radio-navigation service for U.S. coastal waters and was later expanded to include complete coverage of the continental U.S. as well as most of Alaska. Twenty-four U.S. Loran-C stations work in partnership with Canadian and Russian

stations to provide coverage in Canadian waters and the Bering Sea. The system provided better than 0.25 nautical mile absolute accuracy for within the published areas and provided navigation, location, and timing services for both civil and military air, land and marine users. It was approved as an en route supplemental air navigation system for both Instrument Flight Rule and Visual Flight Rule operations.

The Loran-C system served the 48 continental states, their coastal areas, parts of Alaska and neighboring countries for 67 years, 8 months and 24 days.

source: USCG press release

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Gilmerton Bridge repairs to restrict vessel traffic Oct. 2-12

Friday, September 18th, 2009

The Coast Guard Captain of the Port of Hampton Roads advises all local mariners and vessel operators that scheduled repairs to the Gilmerton Lift Bridge fendering system will result in restricted operation October 2 through 12.

The repairs will replace the temporary fenders that have been in place since the tug Steve McAllister allided with the bridge Aug. 13, damaging the west-side fendering system.

The repairs will replace the temporary fendering system which has been in place since the allision.

During the restricted operating times, the drawbridge will open once every two hours, on the hour, which will allow recreational and passenger vessels to pass.

The drawbridge will be opened upon request at any time by piloted vessels, but will require a two-hour advance notification to the drawbridge operator, who can be reached at (757) 545-1512.

Restricted operations are scheduled to occur:

* 8 p.m. Oct. 2 through 5 a.m. Oct. 5
* Oct. 5 through Oct. 8 from 8 p.m. to 5 a.m. each night.
* Oct. 9, 2009 from 8 p.m. through 5 a.m. Oct. 12.

“The replacement is imperative to the support structure of the bridge,” said Lt. Tiffany Duffy, chief of waterways management at Sector Hampton Roads. “Should a vessel allide with the supports, they could cause significant damage to the stability of the bridge.”

source: USCG press release

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