Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
2008
CRED Optical Validation Data at Brooks Banks, 2008 to Support Benthic Habitat Mapping
Video imagery, track line navigation files, and log sheets
http://www.soest.hawaii.edu/pibhmc/
Optical validation data were collected using a Tethered Optical Assessment Device (TOAD), an underwater sled
equipped with an underwater digital video camera and lights. Data were collected at the Northwestern Hawaiian Islands, Brooks Banks to support Benthic Habitat Mapping efforts during NOAA Ship Hi'ialakai cruise HI0804.
These data provide optical observations that will be correlated with bathymetry and acoustic backscatter imagery
to develop a benthic habitat map of Brooks Banks. Refer to supplemental information for description of instrument and
survey.
Brooks Banks, located at 24.1N, 166.8W, are four neighboring flat-topped banks located northwest
of French Frigate Shoals. The four banks, from southeast to northwest, include Baby Brooks, East Brooks, Middle Brooks, and West Brooks and are estimated to be 13.6 million years old. The banks contain a total of 320 sq. km of reef habitat with depths less than 100 m.
Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with underwater
video cameras and lights. These data are used to provide ground-truth validation for benthic habitat maps
based on multibeam echosounder surveys and to gather additional information regarding benthic communities. Camera sled deployments were conducted at night and during the day. The camera sled was deployed off the starboard J-frame on NOAA
ship Hi'ialakai. The TOAD was lowered slowly to the bottom by a winch holding 360 m of cable and operated from a control
station in the dry lab of the ship. The TOAD operator monitored a live video feed from the camera and record data on a
video tape recorder.
Equipment Description: The TOAD sled body used for the data collection is constructed from a shortened Phantom ROV body with a tail piece added for stability.
The frame has been extensively modified from its original configuration and was equipped with two Deep Sea Power and Light Multi SeaCam 2060 color video cameras. One camera is mounted to point at approximately a 45 degree angle toward the seafloor and is the primary data collection instrument. The second camera is aimed straight ahead and the signal from this camera is fed to a second video monitor to provide warning of underwater
obstructions. The video signals from the sled are sent via coaxial conductors within a 360 m long and 19 mm diameter umbilical cable to a topside control unit. The cable between the sled and the surface includes an internal strength member to support the sled frame. The cable is paid out and recovered using a dedicated custom-built winch equipped with slip rings and powered by a 5 hp electric motor. The winch is controlled at the winch itself for sled deployments and recoveries. The rest of the time a remote controller located in the dry lab is used to enable the operator at the video console to adjust the sleds altitude. All TOAD surface components are located in the Dry Lab in an equipment rack
on the after bulkhead. Illumination is provided by two 250 W DeepSea Power & Light Multi-SeaLite model 1050 underwater
lights mounted on the sled frame. The lights are located on each side of the sled to provide the maximum possible
horizontal distance from the camera. An ORE Offshore model 4330B Multibeacon is attached to the sled to provide a
response to acoustic interrogations sent by the Hi'ialakai's Model 4410D-01 Trackpoint II Plus Ultrashort Baseline
acoustic tracking system. The sled is also equipped with a sonar altimeter to detect the height of the camera above
the seafloor, a pair of parallel lasers to determine the size/scale of viewed objects, a compass to determine the
sled heading and orientation, and a depth (pressure) sensor. Neither the altimeter nor the pressure transducer
functioned reliably during this cruise.
Name & address of person collecting data:
John Rooney
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu, HI 96818
Data Files: Video data are recorded on a mini DV video tape recorder. The position of the camera sled is recorded
using Hypack Max version 6.2b survey software.
File naming convention: Each tow is given a name consisting of a 3-letter
designator for the island area followed by two-digit year and three-digit tow number. For example, during HI0804
(NOAA Ship Hi'ialakai's 4th cruise in calendar year 2008) the first tow was called FFS08001. Video tape labels and
paper log forms are annotated with the tow name. Data files recorded in Hypack software followed their CHS filename
format consisting of the year, the first two letters of the platform name, the Julian date, and the hour and minute
in which the file was started. For example, a file collected on July 18, 2005 (Julian date 199) aboard the Hi'ialakai
starting at time 1935 would be 2005HI1991935.
Time Correlation: All times are based on UTC. Four clocks were manually synchronized prior to starting data collection;
the clock in the on screen display that was used to annotate the video tape, in one of the video cassette recorders,
in the Trackpoint II system, and in the computer running the Hypack Max software. These clocks are set to UTC at the
beginning of each operation.
Resource Description: Digital video imagery that is geo-referenced to navigation files.
20080521
20080526
ground condition
None planned
-166.381000
-166.0507162
23.88446685
23.63083857
NCEI Geoportal FilterCoRIS_MetadataCRCP ProjectBenthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands1217
None
Benthic habitat
Underwater video
ISO 19115 Topic Category
biota
002
environment
007
imageryBaseMapsEarthCover
010
CoRIS Discovery Thesaurus
Visual Images > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis > Videography
None
Brooks Banks
Hawaiian Islands
Hawaii
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Brooks Banks (24N166W0002)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Brooks Banks (24N166W0002)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)
CoRIS Region
NWHI
None
Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as the source of this information.
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
John Rooney
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
Pacific Islands Benthic Habitat Mapping Center, Coral Reef Ecosystem Division (CRED), Pacific Islands
Fisheries Science Center (PIFSC), NOAA
Not applicable
Unclassified
Not applicable
Unspecified
Complete
The horizontal position accuracy for the camera sled position is estimated at +/-20 meters. There are two primary sources of this error. The ship's positioning is based on GPS SPS, often called standalone or non-differential GPS positioning. SPS has a measured accuracy of under 5 meters. The position of the GPS antenna is referenced to the ship's granite block. The second and larger primary source of error is uncertainty associated with the sled's position as reported by the Trackpoint II acoustic tracking system, which is also referenced to the granite block.
After a tow is completed the video tape data is reviewed by spot-checking the master and backup
tape to verify that data were recorded. Raw data files recorded using Hypack Max software include time, horizontal
position, and ship's heading information are copied from the acquisition computer to the data archive. Tow-specific
metadata are recorded in the data archive in the same location as the raw data, in a spreadsheet that was then referred
to in creating metadata records of each island where data were collected during the cruise. Raw data files are exported
as comma-delimited text files which were then imported into ArcGIS v9.2 and saved as shapefiles.
20080716
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
John Rooney
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
Offline Data
These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
ASCII
Each comma-delimited record contains information on the UTC date and time, horizontal position of the sled, and heading of the ship over the period of time that the camera sled is in the water.
List of navigation files:
2008HI1421148
2008HI1421317
2008HI1470625
2008HI1471008
CD-ROM
ISO 9660
None
mini digital video and DVD
4h 30min of video data are available covering 6.5 km of seabed.
These data were recorded on 6 video tapes
List of video tapes:
Baby Brooks Bank: BBB08001, Mini DV, (Master) and DVD, (Backup)
Middle Brooks Bank: BBM08001a, Mini DV, (Master) and DVD, (Backup)
Middle Brooks Bank: BBM08001b, Mini DV, (Master) and DVD, (Backup)
Middle Brooks Bank: BBM08002, Mini DV, (Master) and DVD, (Backup)
West Brooks Bank: BBW08001a, Mini DV, (Master) and DVD, (Backup)
West Brooks Bank: BBW08001b, Mini DV, (Master) and DVD, (Backup)
Video cassette tape
Mini DV
None
20200329
20081205
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
CRED Data Management Team
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
None
None
20081205014229
None
20080521
20080526
https://www.coris.noaa.gov/metadata/records/html/cred_toad_brooks_banks_hi0804_2008.html
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