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ID Z-1-07-MB
Also Known As MBARI ID 295
Abstract Monterey Bay Aquarium Research Institute,United States Geological Survey, Menlo Park, California,Stanford University,Chevron. Chief Scientist: David Caress, MBARI. Chirp and Multibeam Sonar data (multibeam, Chirp) of field activity Z-1-07-MB in Little Lucia Canyon and lobe area from 03/12/2007 to 03/14/2007
Organization Monterey Bay Aquarium Research Institute
United States Geological Survey, Menlo Park, California
Stanford University
Chevron
Chief Scientist David Caress
Activity Type Chirp and Multibeam Sonar
Platform Zephyr
Area of Operation Little Lucia Canyon and lobe area, Monterey Bay, CA
Bounding Coordinates
35.75545
-121.80330    -121.76736
35.72686
Ports LEAVE Moss Landing
ARRIVE Moss Landing
Dates 03/12/2007 (JD 071) to 03/14/2007 (JD 073)
Analog Materials No analog holdings.
Information Specialist
Bill Normark
Crew
David Caress Chief Scientist, MBARI
Katie Maier Scientist, Stanford
Hans Thomas AUV operations, MBARI
Duane Thompson AUV operations, MBARI
Aaron Gregg Zephyr crew (Master), MBARI
Matthew Noyes Zephyr crew (Engineer), MBARI
Paul Ban Zephyr crew (Mate), MBARI
Perry Shoemake Zephyr crew (Mate), MBARI
Equipment Used
multibeam
Chirp
Purpose
Three AUV dives were planned in the Little Lucia channel system,
located offshore between Point Sur, CA and the offshore Santa Maria Basin.
The primary target was the transition from highly channelized to unconfined
sedimentation features. The areas mapped are in water depths of 975 to 1050 m.
 The primary objective of these dives is to obtain multibeam bathymetric data
and subbottom profiles. Processing and analysis of this data will be used to
study the sedimentary architecture of the area. Approximately 1.5-m-long
vibracores were taken using the MBARI ROV Tiburon during cruise W-4-06-MB.
Information to be Derived
Very high-resolution bathymetry and subbottom structure of the Little
Lucia channel and lobe system. Bathymetric maps are produced at a one-meter
contour interval.
Summary
~1600/JD071 R/V Zephyr departs Moss Landing.

~1411/JD072 Begin first successful AUV dive over Little Lucia
~2311/JD072 Complete first successful AUV Dive over Little Lucia
~1000/JD073 R/V Zephyr arrives in Moss Landing
A total of 2 AUV dives were completed. The first dive was unsuccessful because problems with the acoustic modem prevented accurate tracking of the AUVs location. Releasing the AUVs drop weight failed to cause the AUV to abort the dive, but the data collected cannot be used for analysis. A second dive covered the same area planned for the first dive and successfully collected multibeam bathymetry and subbottom data. The AUVs starting position was determined by GPS at the launch site. The vehicle then dives in a USBL-nav-aided spiral to 50 meters above the seafloor. The total survey trackline was 42.5 km with 150 m line spacing. The AUV can survey with the multibeam sounding system and chirp sonar for ~9 hours; it then returns to the sea surface to be picked by the R/V Zephyr. Only one-third of the objectives of the cruise were attained because of weather. A second cruise is planned to complete the two additional dives.
Notes
Used seafloor mapping AUV; MBARI's automated underwater vehicle (AUV)
for sea-floor mapping and subbottom profiles. The AUV has a high-resolution
Edgetech chirp sonar profiling system and a multibeam sounding system and uses
both Doppler sonar tracking of the sea floor and an inertial guidance system
for position control.  The AUV descends to 50 m above the seafloor with
USBL-nav-aided spiral descent.
Organization listed Chevron Energy Technology Company; changed to Chevron
Got Help? For Z-1-07-MB, we would appreciate any information on -- analog materials, contract, days at sea, dive count, funding, kms of navigation, national plan, NGDC Info, owner, project, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
Type Webpage KMZ Arc         Metadata        
Metadata data     txt  data  FAQ  xml
Navigation data nav    
Seismic data seis    
Times   060.times    

Z-1-07-MB location map of where navigation 

equipment operated
Z-1-07-MB location map of where navigation 

equipment operated

 
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