Tag: wreck diving

NOAA Teacher at Sea
Noah Doughty
Onboard Research Vessel Western Flyer
September 18 – 22, 2006

Mission: USS Macon Wreck Archeological Expedition
Geographical Area: California Coast
Date: September 22, 2006

Weather Report from the Bridge 
Visibility: Good
Wind direction and speed: ESE at 7kts
Swell direction and height: NW at 4-6’
Seawater temperature: 56.4
Sea level pressure: 1013.3 millibars
Cloud cover: 8/8

Science and Technology Log 

Dr. Rock and Kristof Richmond of Stanford University left the ship late yesterday afternoon, wrapping up the image collection for the photo-mosaic.  Leaving with them was John Geoghegan, a writer for the Smithsonian Air and Space Magazine and the Naval History Magazine. Joining the expedition are Scott Rayder, NOAA Chief of Staff, Richard G. Van Treuren, representing the Naval Airships Association, and Tim Thomas from the Maritime Museum of Monterey.

Today’s activities were devoted to groundtruthing side-scan sonar anomalies located away from the two main debris fields. This is accomplished by simultaneously moving the ROV and the WESTERN FLYER from site to site, a process that would take the better part of an hour depending on the distance being traveled. The transition provided me with an opportunity to briefly operate the “Science Cam”, the seat were you get to operate the zoom, angle and focus of the HDTV camera.  Most of the anomalies were shallow depressions in the muddy bottom with two large sonar hits turning out to be old fish traps.  We did find one large artifact resembling an imploded fuel cell quite a ways from the main debris fields. 

Today is the last day of the expedition and I would like to take the opportunity to thank the NOAA Teacher at Sea Program, the Monterey Bay National Marine Sanctuary Program, and the Monterey Bay Aquarium Research Institute for the opportunity to be part of such an amazing experience.  Finally I would like to thank the ROV Pilots of the Tiburon and the crew of the WESTERN FLYER for providing insightful answers and explanations to a number of questions.

NOAA Teacher at Sea
Noah Doughty
Onboard NOAA Ship Western Flyer
September 18 – 22, 2006

Mission: USS Macon Wreck Archeological Expedition
Geographical Area: California Coast
Date: September 20, 2006

Weather Report from the Bridge 
Visibility: Fair
Wind direction and speed: calm
Swell direction and height: WNW 8-9’
Seawater temperature: 56.1^oF
Sea level pressure: 1023.0 millibars
Cloud cover: 8/8

Science and Technology Log 

As the mosaic work continued on the sea floor I was able to briefly pull the three Principal Investigators (PI) away from the action to ask questions regarding the history of the MACON and the eventual plans for the wreck site. The three PI’s are Chris Grech, of the Monterey Bay Aquarium Research Institute (MBARI), Robert Schwemmer, West Coast Regional Maritime Heritage Program Coordinator based out of the Channel Islands National Marine Sanctuary (CINMS), and Bruce Terrell, a Senior Archeologist for NOAA’s National Marine Sanctuary Program.  Their answers are summarized below:

Question 1: Has the condition of the wreckage changed since the first visit in 1991? 

GRECH: Yes.  There is more sediment on the bottom than before.  Some of the smaller pieces of debris are no longer visible. Meaning they have been moved, covered up, or corroded. Overall the major features are still there, the Sparrowhawk’s and the Maybach’s engines.

Question 2: What technology is being employed this time that wasn’t employed before? 

GRECH: We are using a High Definition camera and HMI lights on the Tiburon. The

HMI lights are high-powered underwater lights.  We know the position of the Tiburon relative to the WESTERN FLYER through the use of USBL (Ultra Short Base Line) technology. Central to the effort is the Stanford Control System, which provides computer aided ROV control enabling us to create the site photo-mosaic. At the same time we are using GIS (Geographical Information System) technology to create a map tied to geographical coordinates. The Stanford Control System and GIS software is run separately but their use is closely linked. Finally, the WESTERN FLYER is able to maintain her position through Dynamic

Positioning, a system where a GPS (Global Positioning System) coordinate is set and the ship is automated to maintain that position.

Question 3: What might eventually happen to the wreck site in terms of protection policy? 

TERRELL/SCHWEMMER:  The MACON already has the ultimate protection regimen.  The wreckage is within the boundaries of the Monterey Bay National Marine Sanctuary, and the Sanctuary has a clearly defined mandate to protect archeological resources.  The US Navy still owns the MACON and the Navy has its own legislation to protect submerged vessels and aircraft.  Last, the wreck site is within State of California waters and so is protected by state law.  From the data gathered on this cruise we will do three things. First is to generate a report on the project that will go to the NOAA Office of Ocean Exploration, who provided much of the funding.  Second will be an archeological assessment that will go to the National Marine Sanctuary Program and to peers.  This assessment will include management recommendations regarding the values and needs of the wreck site. Third will be to begin the process to nominate the MACON to the National Register of Historic Places.  This is a one to two year process.