2017 Laulima O Ka Moana






Daily Updates

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2017 Laulima O Ka Moana Expedition Daily Updates
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Map showing the bathymetry data acquired during our July 2017 cruise in the vicinity of “Keli” Ridge and “Edmondson” Seamount. Data collection efforts over several days were designed to complement previous data acquired by R/V Falkor in 2016 and Okeanos Explorer in 2015. Previously acquired datasets are shown as grayscale, and the data acquired this cruise is shows as color bathymetry.

Map showing the bathymetry data acquired during our July 2017 cruise in the vicinity of “Keli” Ridge and “Edmondson” Seamount. Data collection efforts over several days were designed to complement previous data acquired by R/V Falkor in 2016 and Okeanos Explorer in 2015. Previously acquired datasets are shown as grayscale, and the data acquired this cruise is shown as color bathymetry. Click image for credit and larger view.

3D perspective view of high resolution bathymetric data in the vicinity of “Keli” ridge. Data collected by R/V Falkor in 2016, and by NOAA Ship Okeanos Explorer in 2015 and 2017. Mapping conducted 19-21 July 2017 show “Keli” ridge, “Edmondson” Seamount and an unnamed seamount to the west are geologically connected.

Three-dimensional perspective view of high-resolution bathymetric data in the vicinity of “Keli” ridge; data collected by R/V Falkor in 2016 and by NOAA Ship Okeanos Explorer in 2015 and 2017. Mapping conducted July 19-21, 2017 shows “Keli” ridge, “Edmondson” Seamount, and an unnamed seamount to the west are geologically connected. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 20, 2017

Mapping Operations

Today’s dive was again cancelled as the remotely operated vehicle team completed repairs to the .68 cable in preparation for tomorrow’s dive. The onboard mapping team was prepared to collect data for the scientific community. Due to the remoteness of its location, mapping data of the remote parts of the Johnston Atoll Unit have been very hard to get. Only limited data sets are available in the area, apart from occasional transit data and data acquired by NOAA Ship Okeanos Explorer in 2015 and R/V Falkor in 2016 as part of CAPSTONE. The ship spent the day completing mapping an unnamed seamount located to the west of “Keli” Ridge and acquiring data to spatially connect the earlier datasets from Falkor and Okeanos. The data revealed a seamount with its top at depth of 2,000 meters (6,561 feet), and the combined bathymetry showed that “Keli” Ridge and the two seamounts to the west – an unnamed seamount and “Edmondson” seamount – are geologically connected. After completion of mapping in this area, the ship transited west to begin mapping of another unnamed seamount.


 


 

 

 

A short between the conductors in the .68 cable, located 2850m up the cable, caused a power loss to the vehicles yesterday. The damage could not be repaired so the ROV team used the day to plan and spool the cable off the storage drum, manually lay roughly 2900 meters of cable onto the deck, and cut out the damaged section. The remaining cable was found to be in acceptable condition and will be re-terminated to continue operations.

A short between the conductors in the .68 cable, located 2,850 meters (9,350 feet) up the cable, caused a power loss to the vehicles yesterday. The damage could not be repaired so the remotely operated vehicle team used the day to plan and spool the cable off the storage drum, manually lay roughly 2,900 meters (9,514 feet) of cable onto the deck and cut out the damaged section. The remaining cable was found to be in acceptable condition and will be re-terminated to continue operations. Click image for credit and larger view.

Image showing the first cut of the .68 cable, at 2700 meters. The three layers of steel are peeled back to expose the black core containing three electrical conductors (brown and green twisted), three fibers (black, red, and white with yellow end), and drain wire (curled white). The Fiber Response Team performed a quick termination on one fiber and confirmed that the short was an additional 150 meters up the cable.

Image showing the first cut of the .68 cable, at 2,700 meters (8,858 feet). The three layers of steel are peeled back to expose the black core containing three electrical conductors (brown and green twisted), three fibers (black, red, and white with yellow end), and drain wire (curled white). The Fiber Response Team performed a quick termination on one fiber and confirmed that the short was an additional 150 meters (492 feet) up the cable. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 19, 2017

Cable Repairs and Seamount Mapping

Remotely operated vehicle (ROV) operations were cancelled today while the Global Foundation for Ocean Exploration engineering team initiated a herculean effort to repair the .68 cable. After power was lost to the vehicles yesterday, our ROV team spent the evening investigating the cause and found a short between the conductors, located 2,850 meters (9,350 feet) up the cable from the end terminated to the ROV. The short was likely caused by age and natural degradation, and unfortunately the damage can’t be repaired. The solution is to remove the length of cable up to and including the damaged section. Today, the ROV team used the entire day to plan and spool the cable off the storage drum, manually lay roughly 2,900 meters (9,514 feet) of cable onto the deck, and cut out the damaged section. By the end of the day, they were able to access the damaged section and test the remaining cable on the storage drum. The conductors and fibers were tested and found to be in acceptable condition for re-terminating and continuing operations. Tomorrow the team will re-terminate the wire to Seirios, conduct testing and be ready to dive the next day.

Meanwhile, the mapping team used the lemons (extra time they were given) to make lemonade. The added mapping time was used to further map the unnamed seamount to the west of “Keli” Ridge and to complete tests to improve the backscatter results of multibeam sonar.


 


 

 

 

NOAA Ship Okeanos Explorer Operations Officer, LT Aaron Colohon, shakes Commanding Officer, CDR Eric Johnson’s hand following successful recovery of the ROV. All power and communications to the vehicle were lost during the dive, making recovery more complicated than usual. Next to them, Global Foundation for Ocean Exploration ROV Dive Supervisor, Dan Rogers, oversees operations on the aft deck following recovery.

NOAA Ship Okeanos Explorer Operations Officer, LT Aaron Colohon, shakes Commanding Officer, CDR Eric Johnson’s hand following successful recovery of the remotely operated vehicle (ROV). All power and communications to the vehicle were lost during the dive, making recovery more complicated than usual. Next to them, Global Foundation for Ocean Exploration ROV Dive Supervisor, Dan Rogers, oversees operations on the aft deck following recovery. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 18, 2017

Dive 06: "Keli" Ridge

Out at sea, some days are better than others. Today was one of the more challenging days. We had a delayed start to remotely operated vehicle (ROV) deployment as a squall passed over. After safely getting the vehicles in the water and doing the pre-dive briefing, the onboard team conducted a live interaction with guests at the Exploration Command Center in Silver Spring, Maryland. Once the ROV arrived on bottom, science operations commenced. However during the first hour, the live video feeds to shore went down. Technicians at sea and on shore quickly rallied to troubleshoot and resolve the issue and successfully brought the feeds online within a few hours. Just as the video feeds were brought online, a separate issue caused a loss of power and communication to the vehicles, resulting in immediate cancellation of the dive and vehicle recovery. Once the vehicles were safely recovered, the engineering team spent the night troubleshooting and repairing the vehicles. The team will spent the remainder of the day and night mapping a seamount to the west of “Keli” Ridge.


 


 

 

 

Potential new species of black coral that was collected.

Potential new species of black coral that was collected. Click image for credit and larger view.

Undescribed species of comb jelly identified by Dhugal Lindsay as Intacta.

Undescribed species of comb jelly identified by Dhugal Lindsay as "Intacta." Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 17, 2017

Dive 05: "Sally" Seamount

Today, Deep Discoverer explored the north ridge of a guyot-like feature, traversing to its plateau. The dive began at a depth of approximately 2,170 meters (~7,120 feet) on manganese-encrusted rocky substrate with light colored sediment. We observed numerous dead bamboo coral and glass sponge skeletons, prompting a discussion of whether this was natural mortality or a catastrophic event. Numerous octocorals (primnoids, bamboo corals, and Chrysogorgiids) and black corals were encountered throughout the survey region. Several large, well-developed, older-looking bamboo corals formed moderately abundant patches on elevated mounds of pillow lava. Two aplacophorans, worm-like mollusks, were observed on the barren areas, suggesting predation, whereas elsewhere on the colony, benthic ctenophores were perched, passively fishing for zooplankton. Several unidentified species of cup corals were also documented. Potential new species of bamboo and black coral were collected. Many species of moderate to large-sized glass sponges were documented, and one unusual glass sponge was collected. Echinoderms included a large Henricia sea star, several brittle stars, a swimming sea cucumber, a juvenile transparent slime star, one sea urchin, and several species of feather stars. A small individual feather star displayed a disproportionately large eulimid snail. Other invertebrates included the long-legged shrimp and a swimming large purple polychaete. Fishes observed on the benthic portion of the dive were few and included an unidentified grenadier and a cusk eel.

Midwater surveys were conducted during ascent, starting at a depth of 900 meters (~2,950 feet). Among the most striking of the midwater animals encountered was an undescribed comb jelly, a bristle mouth fish, a swimming cusk eel, several vertically positioned sawtooth eels, and a hatchet fish. Other interesting observations included larvacean houses and a bizarre three- to four-armed glassine protist, numerous hydrozoan jellyfish, a hyperiid amphipod, and several salps.


 


 

 

 

Mapping Watchstander, Neah Baechler, prepares to put the expendable bathythermograph (XBT) equipment away after deploying an XBT. XBTs are launched every ~2-6 hours to acquire temperature  data of the water column down to 760m. These data are used to estimate water column refraction required for multibeam sonar data.

Mapping Watchstander, Neah Baechler, prepares to put the expendable bathythermograph (XBT) equipment away after deploying an XBT. XBTs are launched every ~2-6 hours to acquire temperature data of the water column down to 760 meters (2,493 feet). These data are used to estimate water column refraction required for multibeam sonar data. Click image for credit and larger view.

Expedition Mapping Lead, Mashkoor Malik, works on planning the mapping lines the ship will run today since the weather is too poor to dive. Behind him, Survey Technician Charlie Wilkins edits recently acquired multibeam data.

Expedition Mapping Lead, Mashkoor Malik, works on planning the mapping lines the ship will run today since the weather is too poor to dive. Behind him, Survey Technician Charlie Wilkins edits recently acquired multibeam data. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 16, 2017

Seamount Mapping

Today's remotely operated vehicle dive was cancelled due to high sea state, wind conditions, and shifting currents around Johnston Atoll. Instead, the team spent the day conducting mapping operations to add multibeam coverage to seamounts mapped by NOAA Ship Okeanos Explorer in 2015. New data were collected over ridge features extending northeast from Keli Ridge, resulting in a nearly complete map of the feature. Data were also acquired over top of a seamount to the east and resulted in a complete map of this unnamed seamount – providing new data and insights on the many seamounts and ridges in the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument.


 


 

 

 

 Dense bed of glass sponges (Farrea nr occa?) covering the vertical face of a large block.

Dense bed of glass sponges (Farrea nr occa?) covering the vertical face of a large block. Click image for credit and larger view.

Karstic carbonate formations where numerous colonies of the precious red coral (Hemicorallium sp.) were discovered.

Karstic carbonate formations where numerous colonies of the precious red coral (Hemicorallium sp.) were discovered. Click image for credit and larger view.

A rare observation of the seastar Gilbertaster anacanthus.

A rare observation of the sea star Gilbertaster anacanthus. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 15, 2017

Dive 04: Johnston Atoll Dive

NOAA Ship Okeanos Explorer deployed remotely operated vehicle Deep Discoverer (D2) to a depth of 600 meters (~1,970 feet) where numerous black coral, yellow Acanthogorgia, and Metallogorgia colonies were observed. Cup corals (single polyp scleractinians) were also seen that persisted throughout the dive. Shortly after leaving the landing site, D2 encountered karstic rock formations in an area of high currents. Colonial cnidarians dominated this area. Most importantly, we observed the precious coral Hemicorallium, one of the dive’s primary objectives. First encountered in low abundance, these corals increased significantly when D2 was in an area with high currents and large carbonate blocks; some colonies were large, approximately one meter across. Further upslope, the community transitioned to mostly scleractinian coral, including some “graveyards” – dead coral skeletons that had fallen to the bottom of the slope. In an area with significant current flow, the substrate was covered with several different octocorals, antipatharians, and sponges. Several sea stars were present, including pentagonal “cookie stars” and a new record of a rarely seen Gilbertaster anacanthus. We also observed the goniasterid Circeaster pullus, a known corallivore feeding on the precious coral Hemicorallum for the first time. On two occasions, we observed large blocks with one side covered by glass sponges and the other covered colonies Acanthogorgia colonies. Also observed were two unusual communities of highly abundant and dense micro-invertebrates, one dominated by thin tube-like projections with a “fuzzy” appearance and another by tiny, white zoanthids. Crustaceans included a brachyuran inachid crab with extremely long legs and claws, hermit crabs with sea anemones instead of shells, and small xanthid crabs. Two other unusual invertebrate groups observed included a benthic ctenophore and numerous small white lamp shells with longitudinal notches along each valve. Various fishes were also documented: a ray, deep water cardinal fishes, scorpion fish, channeled rockfish, a few basslets, a spike fish, and two observations of a commercially valuable snapper.


 


 

 

 

The dive started on a flat bottom of moderately large manganese nodules covering a lighter-colored sediment primarily occupied by large hexactinellid sponges approximately .5 to 1 meter tall.

The dive started on a flat bottom of moderately large manganese nodules covering a lighter-colored sediment primarily occupied by large hexactinellid sponges approximately 0.5 to 1 meter tall. Click image for credit and larger view.

A highlight of the midwater transects were the numerous larvacean houses observed, many with the original larvacean present.

A highlight of the midwater transects were the numerous larvacean houses observed, many with the original larvacean present. Click image for credit and larger view.

video Watch video of a rarely seen sorceress eel was observed during the dive.

 


NOAA Ship Okeanos Explorer
July 14, 2017

Dive 03: Unnamed Seamount North of Johnston Atoll

Remotely operated vehicle Deep Discoverer (D2) arrived on a flat bottom of moderately large manganese nodules covering a lighter-colored sediment at 2,571 meters (~8,435 feet) depth. The area was primarily occupied by large hexactinellid sponges. We also observed a hermit crab with multiple zoanthids instead of a shell, smaller “goblet” sponges, and a black coral that had “cleaned” the organic detritus off the manganese nodules in a circle around it. As we moved further upslope, the substrate transitioned to a steeper, more consolidated rock that included manganese-crusted basalt pillows, boulders, and cemented sediment. Megafauna abundance increased – sea anemones and various corals, including chrysogorgiids, were observed. A crinoid was observed whose stalk was covered with hydroids and whose cup had what appeared to be a small eulimid snail attached, possibly parasitizing the crinoid. A second stalked crinoid displayed only four arms but had a eulimid snail attached onto the stump where the fifth arm was originally present. Other animals included a swimming sea cucumber as well as several ophiuroids. A potentially new sea cucumber with a translucent body wall was collected. A new record of Chyrsogorgia, which had been previously known from the East Pacific, was also collected along with its associates, including a squat lobster, amphipods, and several small polychaetes. A striking observation was the swimming/escape behavior from a black cerianthid tube anemone which D2 attempted to collect; it moved away from the manipulator arm. Following the end of the benthic segment of the dive, we undertook a set of midwater transects beginning at 800 meters (~2625 feet). A total of six transect depths was undertaken at 100-meter (~330-foot) intervals. We observed numerous larvacean houses, many with the original larvacean present. Other highlights included narcomedusae (genus Bathykorus), hydromedusae, and an opaque reddish jellyfish in the genus Periphyllopsis. Fish diversity included a hatchet fish, bristlemouths (Cyclothone) and a Sawtooth eel.


 


 

 

 

Onboard Science Leads Drs. Chris Mah and Chris Kelley, and NOAA EPP Intern Nikola Rodriguez, discuss and take a closer look at deepwater habitats explored with ROV Deep Discoverer on Horizon Guyot.

Onboard science leads Drs. Chris Mah and Chris Kelley and NOAA Educational Partnership Program Intern Nikola Rodriguez discuss and take a closer look at deepwater habitats explored with remotely operated vehicle Deep Discoverer on Horizon Guyot. Click image for credit and larger view.

A large spatangoid urchin with prominent spines was observed in conjunction with sediment traces on a large sediment bed.

A large spatangoid urchin with prominent spines was observed in conjunction with sediment traces on a large sediment bed. Click image for credit and larger view.

video Watch a video about the glass sponges seen during the dive.

 


NOAA Ship Okeanos Explorer
July 13, 2017

Dive 02: Horizon Guyot

Horizon Guyot is a manganese-encrusted seamount located north of Johnston Atoll. This site was selected to gain a better understanding of manganese-crust communities. After a delayed start due to a dynamic positioning system issue, Deep Discoverer (D2) arrived on the seafloor at 1,930 meters (~6,330 feet). The substrate was mixed rock consisting primarily of manganese-covered boulders and cobbles with a predominantly thin layer of sediment. The general topography was relatively flat with a community dominated by several species of hexactinellid sponges, many with associates including brittle stars, small squat lobsters, and hydroids. Feather stars were present on the tops of several standing dead or inert glass sponge stalks. Several octocorals and black corals were present in lower abundance, including bamboo corals, primnoids, “mushroom” soft corals, cup corals, chrysogorgiids, and a stoloniferan. Stalked crinoids and ophiuroids were also observed as commensals on both octocorals and glass sponges, and a very large ophiurid was seen on a sandy bottom. Other observations included a spatangoid urchin on a large sediment bed; a synallactid sea cucumber; two freyellid brisingid sea stars on dead sponge stalks; and one fish – a rarely observed cutthroat eel in the family Synaphobranchidae.


 


 

 

 

The crew leveraged the extra time during our transit to conduct a man-overboard safety drill and train new personnel. Here, the ship is maneuvered to recover a buoy thrown overboard and used as practice to test man overboard recovery skills.

The crew leveraged the extra time during our transit to conduct a man-overboard safety drill and train new personnel. Here, the ship is maneuvered to recover a buoy thrown overboard and used as practice to test man-overboard recovery skills. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 12, 2017

Day 6: Underway Transit Mapping

NOAA Ship Okeanos Explorer continued underway transit mapping to the first dive site planned in the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument. Onboard, personnel continued troubleshooting an internet connectivity issue, conducted training and maintenance, and prepared for our next remotely operated vehicle dive. The team also leveraged the transit day to conduct a safety drill and do some education and outreach. We conducted a Facebook Live event in the morning to share information about the expedition and answer questions from the public, and we closed out the day with a presentation on systematics and naming a new species from Science Lead Dr. Chris Mah.


 


 

 

 

With approximately 95 percent of the ocean unexplored, the NOAA Office of Ocean Exploration and Research pursues every opportunity to map, sample, explore, and survey at planned destinations as well as during transits; 'Always Exploring' is a guiding principle. Mapping data is collected at all times when the ship is transiting and underway. This image shows the multibeam bathymetry data acquired during the ship's transit west from Oahu to the Johnston Atoll Unit.

With approximately 95 percent of the ocean unexplored, the NOAA Office of Ocean Exploration and Research pursues every opportunity to map, sample, explore, and survey at planned destinations as well as during transits; "Always Exploring" is a guiding principle. Mapping data is collected at all times when the ship is transiting and underway. This image shows the multibeam bathymetry data acquired during the ship's transit west from Oahu to the Johnston Atoll Unit. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 11, 2017

Day 5: Transit to the Johnston Atoll Unit

Underway mapping was conducted today as the ship continued transiting to the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument for the first dive of the expedition. The transit to the first dive site is about 600 nautical miles and is expected to take about 2.5 days, depending on transit speed. The onboard team used the transit day to work on various tasks, including training new personnel, writing standard operating procedures (SOPs), cleaning and maintaining equipment, troubleshooting minor issues, and preparing for the next dive.


 


 

 

 

Image of the starboard aft deck of NOAA Ship Okeanos Explorer leaving Oahu and beginning a more than two-day transit to the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument.

Image of the starboard aft deck of NOAA Ship Okeanos Explorer leaving Oahu and beginning a more than two-day transit to the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 10, 2017

Day 4: Shakedown Operations Offshore of Oahu

The seagoing expedition team completed the last day of shakedown operations today offshore of Oahu. The day started with a final round of dynamic positioning system testing and training was in the morning, followed by a shakedown remotely operated vehicle (ROV) dive during the afternoon. The "shakedown" or engineering dive provided the pilots a chance to test sensors, cameras, and other important components of the vehicles; train new personnel; and test new techniques without the normal pressures of a science-focused dive. After a successful shakedown dive, the small boat was deployed to conduct a personnel transfer. With all personnel safely onboard, NOAA Ship Okeanos Explorer is now underway and making her way to the Johnston Atoll Unit of the Pacific Remote Islands Marine National Monument. We will spend the next two days conducting transit mapping operations and expect to conduct our first ROV dive in the Monument on July 13.


 


 

 

 

Kongsberg DP Technician, Michael Neal, verifies input signals to the ship's dynamic positioning system after upgrades were made during the ship's dry dock period.

Kongsberg DP Technician, Michael Neal, verifies input signals to the ship's dynamic positioning system after upgrades were made during the ship's dry dock period. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 9, 2017

Day 3: Shakedown Operations Offshore of Oahu

The Laulima O Ka Moana expedition team continues shakedown operations offshore of Oahu. Today's operations focused on calibrating the Ultra Short Base Line (USBL) acoustic navigation system – a system that uses sonar to track and record the position of the remotely operated vehicles at depth relative to the ship during a dive. In the afternoon, a test CTD (Conductivity, Temperature, Depth) cast was conducted down to 760 meters (2,493 feet) to compare data against an expendable bathythermograph (XBT) cast that was also conducted. However, during the upcast, the connection to the CTD failed. In the evening, additional Dynamic Positioning testing and training was conducted with onboard personnel. Overnight operations will include running a test survey with the multibeam sonar.


 


 

 

 

Learn more about what a multibeam patch test is and what it consists of by reviewing this poster developed by Okeanos Explorer mapping interns in 2010.

Learn more about what a multibeam patch test is and what it consists of by reviewing this poster developed by Okeanos Explorer mapping interns in 2010. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 8, 2017

Day 2: Shakedown Operations Offshore of Oahu

The Laulima O Ka Moana Expedition team is offshore of Oahu continuing shakedown operations. Today's operations focused on testing upgrades to the ship's Dynamic Positioning system – a key capability that allows the ship to precisely hold station while conducting remotely operated vehicle dives or other operations. Overnight, the mapping team conducted a test mapping survey and processed and analyzed the results from the multibeam patch test.


 


 

 

 

Picture of the sailing board on NOAA Ship Okeanos Explorer showing the date and time of departure for the next cruise, and the time by which all personnel who are sailing need to be physically on board the ship to sail. Cruise EX-17-06 departed on time at 0900 on Friday, July 7th as planned.

Picture of the sailing board on NOAA Ship Okeanos Explorer showing the date and time of departure for the next cruise and the time by which all personnel who are sailing need to be physically on board the ship to sail. Cruise EX-17-06 departed on time at 0900 on Friday, July 7, as planned. Click image for credit and larger view.

NOAA Ship Okeanos Explorer pulls away from the Fuel Pier and prepares to depart Pearl Harbor to commence part I of the Laulima O Ka Moana Expedition - shakedown operations offshore of Oahu.

NOAA Ship Okeanos Explorer pulls away from the fuel pier and prepares to depart Pearl Harbor to commence Part I of the Laulima O Ka Moana Expedition – shakedown operations offshore of Oahu. Click image for credit and larger view.

 


NOAA Ship Okeanos Explorer
July 7, 2017

Day 1: Laulima O Ka Moana: Exploring Deep Monument Waters Around Johnston Atoll Expedition Is Underway!

The "Laulima O Ka Moana: Exploring Deep Monument Waters Around Johnston Atoll" expedition started today! NOAA Ship Okeanos Explorer left the dock in Honolulu, Hawaii, this morning to make the first and most important stop of the expedition – the fuel pier – where she spent most of the day fueling up for the more than 2,000 nautical mile journey ahead. The team departed Pearl Harbor in the evening to start shakedown operations after recently completing dry dock maintenance and upgrades. Overnight activities included calibrating the ship’s GAMS system (which provides a heading calibration) and both Acoustic Doppler Current Profilers and starting a multibeam patch test to calibrate and test the accuracy and quality of the multibeam sonar.


 


 

 

 

 

 

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