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) 200512 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 in the Commonwealth of the Northern Mariana Islands (CNMI), around 18 different islands and banks, to support Benthic Habitat Mapping efforts during NOAA Ship Oscar Elton Sette cruise OES0307, from August 22 through September 21, 2003. These data provide optical observations that will be correlated with bathymetry and acoustic backscatter imagery to develop a benthic habitat map of Agrihan Island. Refer to supplemental information for description of instrument and survey. Agrihan is a dormant volcanic cone, with a land area of 47.4 square kilometers. The impact of feral goats and pigs is most evident on the eastern side of the island where resulting sedimentation and runoff is thought to have a significant effect on the marine environment. This is presently the only northern island that supports a permanent population, which currently stands at seven people. Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with underwater video camera and lights. These data are used to provide ground-truth validation for benthic habitat maps based on multibeam echosounder surveys. Camera sled deployments were conducted at night, usually between 1800 and midnight. The duration of each tow varied but averaged about 40 minutes of bottom time at a given location. The camera sled was deployed from the port J-frame mounted amidships on the NOAA Ship Oscar Elton Sette. At each station the ship was positioned with the wind on the port side and drifted downwind; occasional light turns were applied to the ship's screws if necessary to reduce the ship's motion. The TOAD was lowered slowly to the bottom by the deck crew using a capstan. The operator monitored a live video feed from the camera and began recording data on a video tape recorder. When the camera reached bottom the deck crew was notified by radio to stop lowering. The operator continued to monitor the vehicle and provided commands to raise or lower it to keep the camera just above the bottom. Equipment Description: The TOAD was deployed from the lower arm of the vessel's port side J-frame. The TOAD is a camera sled based on the Guildline MiniBat model 8820 tow body. The frame has been extensively modified from its original configuration and was equipped with an ROS model 54-00100-13 color underwater video camera as the primary data collection instrument. The ROS camera was mounted to point at approximately a 45 degree angle toward the seafloor. A Deep Sea Power and Light model 2050 MultiSeaCam low-light color video camera was also mounted on the sled and aimed straight ahead. The signal from this camera was fed to a second video monitor to provide warning of underwater obstructions the sled might be headed for. Illumination was provided by two 500 W DeepSea Power & Light Multi-SeaLite model 1050 underwater lights mounted on the original sled frame. The lights were located near the base and each side of the sled to provide the maximum possible horizontal distance from the ROS camera. Cable between the sled and the surface consisted of a underwater electrical cable (cable 2, black in color) with an internal kevlar strength member to support the sled frame. The cable was led from the camera sled over a 22-inch diameter sheave hung from the J-frame, and from there around a gypsy head mounted on the alternate CTD winch, amidships on the vessel's port side. All TOAD surface components were located in the Dry Lab in an equipment rack on the after bulkhead. Name & address of person collecting data: John Rooney NOAA PIFSC 1125B Ala Moana Blvd Honolulu, HI 98614 Data Files: Video data were recorded on a video tape recorder. The position of the camera sled was recorded in WGS-84 using Guildline MiniBat In-Tow data acquisition software and a data feed from a shipboard Northstar Chartplotter. File naming convention: Each tow is given a name consisting of a three-letter designator for the island area, followed by a two-digit year and a three-digit tow number, which increments by one for each new tow around that island. For Argihan Island the designator is "AGR."During OES0307 (NOAA Ship Oscar Elton Sette's 7th cruise in calendar year 2003) the consecutive numbers started at AGR03000. Video tape labels, the navigation files (*.glo) and paper log forms are annotated with the tow name and number, e.g., AGR03002. If the navigation file is edited during processing the file name has a suffix 'a' added. For example, for a navigation data file named AGR03002a.glo, the 'a' would indicate that metadata were extracted from the navigation data and recorded to a file with the same name as the navigation file except that a file type of '.met' was appended; for example, 'AGR03002a.glo.met. Time Correlation: All times are based on UTC. Two clocks were manually synchronized prior to starting data collection; the clock in the video character generator that was used to annotate the video tape, and the clock in the TOAD data acquisition computer. These clocks were set to UTC at the beginning of each evening's operations. Resource Description: Digital video imagery that is geo-referenced to navigation files. 20030827 20030906 ground condition Complete None planned 145.33 145.70 18.82 18.72 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 CoRIS Discovery Thesaurus Visual Images > Habitats None Tethered Optical Assessment Device (TOAD) Underwater video OES0307 ISO 19115 Topic Category environment biota CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Agrihan Island > Agrihan Island (18N145E0002) COUNTRY/TERRITORY > Northern Mariana Islands > Agrihan Island > Agrihan Island (18N145E0002) OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000) COUNTRY/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000) CoRIS Region CNMI 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

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu 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 plus or minus 100 meters. There are three 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 used; no attempt is made to translocate this position to that of the tow block from which the camera is deployed. The difference between the tow block and the antenna is about 14 meters. The largest source of error is uncertainty associated with the sled's position relative to the tow block. After a tow was completed the video tape data and still photographs were reviewed by spot-checking to verify that data were recorded. Navigation data were copied from the acquisition computer to the data archive. A metadata extractor (gloMeta.py, version 9/28/04) was run to summarize the navigation data and test for errors. If errors were detected they were corrected or flagged as appropriate and a new data file was made. This file's header was updated to document what type of processing occurred. A metadata file was recorded in the data archive in the same location as the navigation data. Processed navigation data were then read into ArcView 3.2 shapefiles using an Avenue script named `toadimport.playback.ave', version 9/25/01, written by Ronald Hoeke. 20051017 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

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu 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 Navigation information are recorded as successive lines in a comma-delimited ASCII text file, with a .glo extension. Each line of a GLO file includes the following data: the year, day of year, time, latitude, longitude, water column depth, vehicle depth, layback, and wing angle. The field for wing angle does not contain useful data. A total of 8 navigation files were collected, including: agr03000a.glo agr03001a.glo agr03002.glo agr03003.glo agr03004.glo agr03005.glo agr03006.glo agr03007a.glo CD-ROM ISO 9660 mini DV digital video cassette These data were recorded on 5 VHS tapes, 7 mini DV tapes, include 7 hours and 3 min of video data covering 12.6 linear km of seabed. List of video tapes: AGR03000, VHS, Master AGR03001, VHS, Master AGR03002, VHS, Master AGR03003-005, VHS, Master AGR03006-007, VHS, Master AGR03000, Mini DV, Master AGR03001, Mini DV, Master AGR03002, Mini DV, Master AGR03003-005a, Mini DV, Master AGR03005b, Mini DV, Master AGR03006-007a, Mini DV, Master AGR03007b, Mini DV, Master AGR03000, Mini DV, Backup AGR03001, Mini DV, Backup AGR03002, Mini DV, Backup AGR03003-005, Mini DV, Backup AGR03305b, Mini DV, Backup AGR03006-007, Mini DV, Backup AGR03007b, Mini DV, Backup Video cassette tape mini DV None 20121220 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

1125B Ala Moana Blvd.

Honolulu HI 96814 (808) 983-3776 (808) 983-2902 pibhmc@soest.hawaii.edu e-mail preferred FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 20080502125528 None 20030827 20030906 http://www.coris.noaa.gov/metadata/records/html/cred_toad_agrihan_oes0307_2003.html 1332