Fast chart update of navigation danger protects Georgia boaters

Thanks to a combination of determination and technical advancements, Coast Survey was able to locate, report, and chart a danger to navigation within two weeks – a major improvement over the three-to-ten-year chart update protocol of only a few years ago.

On Monday, November 14, a Coast Survey navigation response team hit the waters of St Simons Sound, off the coast of Georgia, when the U.S. Coast Guard asked us to find a sunken fishing vessel. By the next morning, the team of James Kirkpatrick and Kyle Ward (who augmented on the project, from his normal duty as navigation manager in Charleston), reported to the Coast Guard, noting that the wreck is very shoal. They also observed recreational vessels transiting the area every 10 to 15 minutes. Coast Survey quickly issued an official Danger to Navigation Report.

 

chart_overview
Location of the wreck
mb1
Wreck as seen with multibeam echo sounder
sss1
Wreck as seen with side scan sonar

 

The team’s hydrographic data determined a least depth of 0.4 meters (1.3 feet) at position 31-07-34.41N// 081-25-15.88W. The vessel appears to be lying on its port side with the bow pointing in an approximate SE orientation with the stern slightly higher than the bow. The least depth appears to be on some type of rigging or fishing gear protruding from the midship area.

Recognizing that a boat could easily hit the submerged wreck, the navigation response team asked Coast Survey cartographers to quickly add it to the charts. The cartographers acted immediately, applying the wreck symbol to paper, raster, and electronic charts of the area. The cartographers, working with branch chief Ken Forster, will publish the updated charts with the next cycle of weekly updates, scheduled for Wednesday, November 23.

image001
Coast Survey is updating charts 11506 and 11502, and ENCs US5GA13M and US4GA11M

 

Finding and charting dangers to navigation are our highest priorities. We encourage mariners who suspect dangers, or who want to report any chart discrepancy, to file a fast and easy report on our website.

This blog is monitored during regular working hours (8 am to 5 pm, ET), and we will moderate comments as soon as possible. Approval of comments offered during evenings or weekends may be delayed.

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s