Expeditions 346 T and 349P Technical Reports
October 28 to November 27 2013




LAB OFFICER'S REPORT
General Leg Information
Port Call Activities Overview
Busan, Korea
Subic Bay, Philippines
LAB STACK
Bridge Deck
Offices and Conference Room
CORE LAB Deck
Securing Lab
Projects
Paleo Lab
P- MAG LAB
M-BIO Lab
Floor Repair
XRD LAB
Summary:
Expedition 349P System Manager's Report
Summary:
Servers (Microsoft):
Servers (OES)
Servers (Solaris):
EVA4000 Storage:
Network:
PC Workstations:
MAC WORKSTATIONS:
Satellite/Internet/Phones:
Other Equipment/Projects:
ET Report
Summary
Pallet store
DHML
Fantail
Sonar Dome
Lab wood work surfaces
Cryomag
Rohde & Schwartz Analyzer
Chemistry Lab
Balances
Cary Spectrophotometer
Gas Lines/manifold
Freeze drier
GC2-pft
GC3/NGA : GCQ/GCD
Hydrogen generators
IC
ICP
SRA
titrators
TOC
Water system
Misc
to do
UNDERWAY GEOPHYSICS LAB
Summary
Data Summary
Equipment Performance Summary:
WinFrog
Trimble GPS
Bathy 2010
Magnetometer
Data Backups
FANTAIL
Summary
Special projects
Sonar Dome
Preparation for diver removal of the sonar dome
Diver Removal
Sonar Dome Installation in dry dock
Sonar Dome Mating Problems
A response was written up as follows:
The Gus Report

LAB OFFICER'S REPORT

Roy Davis

General Leg Information

Expedition 346 T Transit commenced on September 28, 2013 at Busan, Korea with the boarding of the marine specialists. The vessel sailed at 13:00 on October 1, 2013for Subic Bay, Philippines. A dry dock and tie up period are planned. On the transit the vessel stopped to deploy the new VIT camera and cable to 5000 meters test depth. The vessel arrived at the Keppel shipyard, Subic Bay on October 8, 2013 commencing 349P Subic Dry Dock.
The vessel was delayed in entering the dry dock till October 22. The vessel left the dry dock on November 23 and went pier side at the Keppel yard to finish up various repairs.
During the shipyard period two shifts were staffed. Days were staffed with Davis, Cannon, Claassen and Midgley. The night shift was staffed by, Gustafson, Kotze and Moortgat. While the ship was in the dry dock the staff resided at the Lighthouse Marina hotel in SBMA.

Port Call Activities Overview

Busan, Korea

• A small technical staff boarded the vessel

Loading of

• Air freight

Offloading of

• IODP Cores
• Frozen and Refrigerated samples
• Air Freight
• Trash

Subic Bay, Philippines

• Arrival at Keppel Shipyard on October 8
• On the evening of October 11 at 18:00the vessel went to anchor to ride out a typhoon.
• Following passage of storm the vessel returned to the Keppel yard dockside on the morning of October 13.
• The vessel entered the dry dock on October 22
• The vessel left dry dock on November 23

LAB STACK

The areas of the lab stack, which were accessible, were stripped of all removable equipment at risk of being taken. This included all public area TVs, computers and supplies.

Bridge Deck

Offices and Conference Room

The bridge deck offices and conference room area were emptied of furniture and the floors resurfaced by the flooring crew.

CORE LAB Deck

Securing Lab

A series of plywood walls with doors were built on the transit to Subic Bay. This allowed the core lab, Paleo prep and cutting room/core entry and down hole lab areas to be secured.

Projects

The small area in the splitting room floor was repaired and painted.

Paleo Lab

The microscopes and computers were moved to the Paleo prep lab for storage. They were then moved to the core lab when the overhead was removed in the Paleo prep lab for vent work.

P- MAG LAB

Due to concerns about loss of chilled water and power to the Cryo mag when the ship entered dry dock, steps were taken. An air-cooled Haskris unit shipped from the beach replaced the Haskris unit, which used chill water. The ships electricians wired two outlets near the breaker panels on to the emergency generator circuit. Extension cords were run to the Haskris unit and the Cryo Compressor. Since the emergency generator supplies only 120 volts and units required 240 volts transformers were put in place. This set up was left in place for all of the dry dock to guard against loss of power to the ship.
NOTE: The emergency generator failed on November 22 during a scheduled power outage at the yard and is not operational at this time
While removing the ice in the Cryo the bottom wear strip came loose. The beach has been notified of this and plans made to have the Hastedt and Evans repair it during the TOP. Several different types of tapes and plastic strips have been ordered to be tried.

Emergency Generator Plug in for Cryo Cooler and Haskris



Transformers

Air cooled Haskris

M-BIO Lab

Floor Repair

The cabinets in the entry part of the M-Bio lab were removed and the floor repair by the flooring crew. The area was painted and cabinets reinstalled

XRD LAB

Summary:

• The lab was emptied of all movable equipment and the Haskris unit disconnected in preparation for the repair of the floor in the corner. The floor was surfaced with the new flooring.

Expedition 349P System Manager's Report

Mike Cannon

Summary:

EXP349P was a tie up and dry dock period. The data center was shut down for most of this period due to power and cooling inconsistencies and was only powered up for brief periods for various purposes.

Servers (Microsoft):

• We had power supply failures after shutting down the data center on several servers including Erebus, McKinley and Krakatoa. These power supplies were replaced with parts from our spares inventory and replacements are being shipped in.

Servers (OES)

• After our first data center power down and power up I noticed one of the cluster's NSS pools, POOL1, would not start. POOL1 is the cluster resource that holds user data and science data during an expedition. I started a ticket with Novell but the frequent data center shut downs have hampered troubleshooting. The issue is ongoing but, after the ship is out of dry dock and the data center can be fully operational again, the problem will be fixed.

Servers (Solaris):

• It was noted that Etna has a failed cluster disk. This has not affected operation and should be a correctable problem.

EVA4000 Storage:

• We had a drive failure. The drive was replaced with a part from spares and a replacement drive is being shipped to the ship.
• I discovered at the beginning of the trip that one of the two controllers had failed. It would not power on even though it had power. I started a ticket with HP and they sent out a technician who confirmed the controller enclosure and mid-plane needed replacement. HP shipped in a new controller enclosure and I performed the change. The new controller became operational and joined the SAN with no problems and the EVA is again 100% operational.
• Not long after the new controller was online, I discovered the battery was also bad. I had HP ship in a battery and swapped it and the new battery is confirmed functional.

Network:

• The networking equipment performed as expected with no issues to report.
• We are beginning a project to update some of the main switches in the network to newer models. This work is starting as I am typing this report.

PC Workstations:

• Nothing to report as most of the PC workstations have been shut down for most of the trip.

MAC WORKSTATIONS:

• Nothing to report as most of the mac workstations have been shut down for most of the trip.

Satellite/Internet/Phones:

• We have experienced constant outages mostly due to crane activity in the shipyard with a few exceptions, one of which is noted below. The aft radome has been completely blocked during the dry dock period by superstructure on the dock.
• We had an extended outage on 10/28 which I initially took for crane activity blocking the bow antenna. Upon further investigation I found that we had no signal noise at all, which usually indicates an issue with the above decks equipment in the radome. I entered the bow radome and discovered two issues. One, the cooling unit in the radome was not operating, it had no power and it was very hot in the radome. The second issue, the Codan transceiver had no power due to a blown fuse. I informed John Mackintosh of the issues. His team discovered that someone had turned off the cooling unit at the breaker box in the radio room. He was not sure who turned it off or when. With the breaker on, the cooling unit was functioning again. We replaced the fuse in the transceiver and the unit powered on and became functional and has been operating fine since.
• Upon discovering the cooling problem in the bow radome, I decided to check the aft radome as well. In there I found the cooling unit was also not functioning but for a different reason. The unit had power but had an error code on the display panel, "HPF" which in the manual means High Freon Pressure. The manual indicated that the problem was usually associated with an airflow problem on the condenser side of the system. I informed John Mackintosh and he has his team look at it. They found the problem; the condenser fan motor had failed. We purchased replacement parts and had them shipped in. Once in and installed the cooling unit became function again.
• I conducted a frequency change with Rignet on 11/2 to move to a different transponder. This move was not due to service issue but was a house keeping measure by Intelsat, the owner of the space vehicle to clean up their transponders. No issues to report.

Other Equipment/Projects:

• Replaced the projectors in the conference room with new models and ran new VGA and HDMI cables. Mounted a new wall plate to connect laptops and other devices to the projectors.
• We had existing fiber cabling in the SAN rack that was too long and was tough to manage and track down problems due to its excessive length. I removed that cable and ran new cable of a more appropriate length to better manage the cabling in the SAN rack.

ET Report

Summary

• This was a transit and dry dock "Expedition" as the ship sailed with a skeleton IODP staff from S.Korea to the Philippines to get the labs inner spaces walled up with wooden board and fitted with entry doors to give shipyard entry protection. Isles were left for walk through areas that needed a passageway. All in preparation to the big floor fix and repainting.
• All loose and movable equipment was stashed away in either closed up areas or steel banded strapped where cupboards allowed it.
• All window "peepholes" and glass sliding doors in Splitter room where covered up with paper covering to keep peeping eyes looking in.
• Where needed lab equipment where covered up in wrapping plastic to keep out sanding dust from floor sanding and chipping machines.

Walls were built to secure equipment and lab spaces.

• All three the offices were emptied and al equipment were remove to the down hole lab an d to the pallet stores, the floors was repair and painted by the floor contractor, all equipment was reinstall in the offices.
• The movie room emptied for new carpets, all audio and video equipment were removed, the equipment rack were change and wheels were install to the bottom to make it easier to move the rack.

Pallet store

• The analytical gas bottles had to be disconnected and moved away to make space for office furniture in Bridge deck offices (work benches and work surfaces) where disassembled to be stored in pallet store while floor work was in progress. All Bridge deck chairs where stored in conference room for the while.
• As soon as the floors were done on Bridge deck the tables got cleaned from black sanding dust entering all areas on the ship and carted back to different offices and re-assembled. (Staff/Co chief, LO office and Ops office.) The pallet store space was once again needed for 40 feet container that arrived with various shipped material. All K-boxes and various packages where packed there. Erik and Gus unpacked and inspected hazardous chemicals and stored it in hazardous material locker. We moved the new GC to the chem lab for preparatory work as well or at least for safer storage than the pallet store in the meantime till analytical gas will be available again.

DHML

• The DHML area where cleared as best we could to use as storage space for workstations and screens for the working period and moved back to places where they could be used by staff in safe areas and where they belong where they would be inside closed off areas.

Fantail

• All open boxes (2 X fixed firing Boxes) and equipment fitted there where covered with plastic tarps to protect from sandblasting grid.
• The new portable fiberglass gun firing box enclosure arrived with the shipment and was wired and assembled to replace the old metal enclosure box, which became ugly and dilapidated.

Sonar Dome

• The sonar dome was removed with ship still floating in port by divers and cleaned. Gus did the mechanical checks and nut/bolt etc. reconditioning as he normally does. We did the electrical transducer measurements to make sure all was still intact and all measurements were still as we had it measured with the last fitment in Singapore and Lisbon. The cable connections were refitted to the junction box as well. It was sandblasted refitted and painted again. The gas pressure test is still ongoing and looks good. All "O" ring seals, (the O'Brien seals and the big seal in the coupling neck on the ship body) were replaced with new ones.

Lab wood work surfaces

• Etienne removed all lab worktables and tracks that needed cleaning and varnish and did a very neat job. The work areas covered with bar-top coating is still in good condition and the odd one that needs stripping will have to wait till we can get proper material to strip it with. Proper material for the job is not available here in Subic area.

Cryomag

A temporary Haskris was installed for the Cryomag that uses its own air-cooled compressor that makes the system free from ship cooling water that can be unstable in dry dock situations. The Unit works very satisfactory.

Rohde & Schwartz Analyzer

The new battery pack on order was received and installed. Charged and tested. Instrument in good functioning order again.

Chemistry Lab

Erik Moortgat

Balances

Reducing the mass of the pans, for the high-precision balances, by removing base rods, to test for better precision at the low end of our expected mass range, did not work. The Mettler does not recognize that there is a pan placed, thus, will not work. Reducing the number of rods removed may allow the pan to be recognized but sort of defeats the purpose of the test. There 'may' be an option of hacking into the Mettler's firmware but this may result in the Mettler being completely non-functional and this may not be a good idea. Going to send the high-precision Mettlers (IODP # 90785 & 90786), back to IODP.
Carver Presses
Piston and top plates were scraped and re-painted.
New motor packs received. Parts spec'd out and ordered for orienting the high-pressure hydraulic lines in an elbow from the units to accommodate the three units side-by-side.

Cary Spectrophotometer

More peristaltic pump tubing was ordered.
Looking at our methodology and required reagents for measuring hydrogen sulfide and nitrite/nitrate next Expedition.

Gas Lines/manifold

Ran tubing for nitrogen lines to the new GC 7890s.
Except for one helium and one argon rack, all racks are empty (placed in Hold reefer) and to be removed during Subic tie-up.

Freeze drier

Checked oil and everything appears fine.

GC2-pft

New Maestro software, for the GERSTEL auto sampler, was installed. All tray/agitator/injector position settings were reconfigured.
Received errors that the mandatory licenses for the Agilent Instrument Control and Agilent GC Drivers could not be found. A new OpenLab license file for the correct MAC address of the PC was installed.
Inlet liner and septa was replaced.
Various methodologies for possible usage during Expedition 349 were tested. With time permitting, tried different columns, oven ramps, dilution protocols. We might have a good method, using a Restek BOND/KCl column and diluting the PFT in iso-octane. Waiting to hear from David Houpt about the last test results sent.

GC3/NGA : GCQ/GCD

NGA was moved to prep for one of the new GC 7890s coming onboard during Subic tie-up. The two new GCs will be called GCQ and GCD. I noticed that the syringe needle on the AS is bent.
To accommodate the new GCs, the shelving above the island had to be re-constructed.

Hydrogen generators

It was reported that the generators were having inadequate flow issues. I tightened all fittings, including the reservoir fill cap and everything seems to be operating normally.
The two old spare units (90246/90265) home are being sent home. A new hydrogen generator was received in the shipment and was placed under the wood shop mezzanine.

IC

Cation peak issues troubleshooting:

• Replaced MSM tubing (6.1826.320). One of the old ones had been cut to a shorter length and the other appears to be the wrong one for that pump.
• Cation inline filter : two filter papers were jammed in there. Removed and replaced with one.
• Changed the cation guard/separation columns.
• Noticed that the cation pump was cycling between about 0.3 MPa and 2.1 MPa.
• Performed PM procedure on cation pump, per page 24 of the Routine Maintenance Guide
  • Replaced the inlet/outlet check valves.
  • Replaced piston seals.
• Cation pump now operating at a consistent 4.4 MPa. A bit lower than the previous 5.1 MPa.
  • Performed a calibration test and all peaks were coming out normal.
  • More testing to be performed once the vessel is out of dry dock.

ICP

The rock standards for upcoming Expedition requirements were inventoried.

SRA

Sent home (from Busan) for maintenance and use by Kara Bogus.

titrators

Were not used.

TOC

Not much was done in the way of 'testing' aside from making sure that the pure air generator was working and that the CO₂ baseline was within normal operating values. I don't know if it will be used in any of our upcoming Expeditions but it should be good to go.
After air generator operating, a leak was observed at the inlet to the ascarite scrubber. The damaged O-ring was replaced.

Water system

No issues to report.

Misc

Hazardous waste removed in Busan.
Put in a requisition for titration electrode connector cables.
The burnt out refrigerator light was replaced.
Counter-tops by SRA, GC and two desks in MBIO were sanded and refinished.
Cracks in MBIO floor repaired by contractor and floor section painted by IODP staff.
Required TAMU online training modules were completed.
Relocated the ChemLab Zebra Printer due to lack of LAN ports on the GC/IC island.
DO NOT use the sinks during a dry-dock!
First 349P S/F arrived and unpacked.

to do

Install columns in GCD and set-up. Acquire monitor, keyboard and mouse for the new PC.
Connect helium bottles to gas manifold. Startup lab air and nitrogen generator.
The two Mettler balances and hydrogen generators are to put into a K-Box for surface freight shipment back to IODP.
Move NGA GC to a location on the vessel, out of the way, with the intention of sending back to IODP when the new GC 7890s are configured and working.

UNDERWAY GEOPHYSICS LAB

Roy Davis

Summary

The magnetometer was damaged on the previous expedition.
When the ship was alongside at Keppel Shipyard in Subic Bay the sonar dome was removed prior to entering the dry dock by divers. It was then remounted in the dry dock.

Data Summary

Equipment Performance Summary:

WinFrog

Was run on transit to Subic Bay then shut down for the dry dock period.

Trimble GPS

Was run on transit to Subic Bay then shut down for the dry dock period.

Bathy 2010

Was run on transit to Subic Bay then shut down for the dry dock period. Tested at dockside after dry dock.

Magnetometer

The Magnetometer was damaged on the previous Expedition. At first it was decided to ship the magnetometer fish and cable back to the manufacture for repair. The cable was spooled off into a K-box prior to the power being shut off to the aft winches when the ship entered dry dock. It is now in a gray K-Box on the helo pad.
With input from the beach the cable and fish will now remain onboard and be repaired on the ship. The resin was received for the repair of the cable and given to the ETs

Data Backups

Bathy Files for 346T are on Winfrog 2
C:\EXP BATHY DATA, EXP346T, ODEC, SEGY
Navigation Files for 346T are on Winfrog 1
C:\EXP NAV DATA, EXP346T_L1_DAT

FANTAIL

Roy Davis, Gus

Summary

Bathymetric and navigational data was collected on the transit from Pusan to Subic Bay.

Special projects

All the equipment on the fantail was covered in plastic and tarps to protect it from sandblasting grit during the dry dock period.

Sonar Dome

Divers removed the sonar dome while the vessel lay alongside the dock at Keppel Subic shipyard.

Preparation for diver removal of the sonar dome

• As noted from the Lisbon dry dock sonar dome mount rebuild one of the lifting eyes socket was possibly stripped / damaged. This was the port forward lifting eye socket on the sonar dome.
• The lifting eyes were examined and one found to have stripped treads. Gus and the ships machinists welded up and cut a new treaded insert for the lifting eye on the transit down to Subic Bay
• Due to concerns with the ability to safely lift the dome with a possibly damaged lifting point a plate matching the sonar dome's flange was fabricated with a large central pad eye. This was non-drestructively tested.
• The sonar hull tunnel blanking plate was obtained from the bridge where it is stored and cleaned up. It was found to have a different hole pattern than the current sonar dome flange, which was made up new in the Lisbon dry docking. A new blanking plate was fabricated to lineup with the new hull flange.
• The bellybands were found in the sub sea shop. One is 200 ft. and the other 175 ft. These lengths proved to be a bit long. The 3/8-inch stainless cables are showing signs of wear. New cables should be procured for future sonar dome removal.
• At 2 points on each side of the vessel chain falls were positioned to run the bellyband cables.
• A tugger was welded under the lifeboats on the starboard side of the vessel to be used to pull the dome from under the vessel.

Sonar Dome Center Mount Lifting Plate

Sonar Dome Hull Blanking Plate

Sonar Dome Lifting Eyes Sonar Dome 3/8" Belly Bands
Sonar Dome Tugger Placement Starboard Core Deck

Sonar Dome Belly Bands and Chain Falls attachment points

Sonar Dome Lifting Bridle with Center Plate hung on Chain Fall
Sonar Dome Divers and Lifting Gear

Diver Removal

• An extensive briefing with the yard foreman and lead diver on the procedure to removal was held. That being said the divers went there own way in removing the dome.
• A team of 3 divers, one with comms started mid day to remove the dome.
  • The pad eyes were installed and the bellybands run thru them and up to the chain falls. Tension was taken on the wires.
    • The cables required eyes to be bolted up with cable clamps to shorten them to get the required tension on them.
  • The sonar dome was then unbolted.
  • This is when the divers were supposed to pull the dome from under the vessel to the starboard side with the tugger. Instead they elected to have the center lifting plate with the pad eye hung on a chain fall lower by the yard crane, which they then pulled under the vessel with a rope from dockside.
  • The struggled well into the evening with bolting it up and finally were able to pull the dome out from under the vessel with the crane pulling on the center plate assisted with a lifting bag. Once the dome was clear of the vessel a four point lifting bridle to the domes lifting eyes after the bellybands were pulled free of the lifting eyes. A 4-point lifting bridle was attached to the lifting eyes. The center plate and pad eye were hooked to the crane along with a chain fall and a load taken on it so as to secure a 5-point lift on the sonar dome. It was placed on the dock.

Sonar Dome 5 point lifting bridle

• The sonar dome was lifted on to the ship and placed on the lab stack roof next to the alligator boxes.
• The top was cleared of marine growth and a missing piece of rubber sound insulation replaced.
• The dome was rolled over and the bottom cleaned.
• The 12 kHz array was lifted out and the interior of the dome examined
• The transducers were covered in heavy tape and plywood to protect them.

Sonar Dome Installation in dry dock

• The sonar dome was lifted to the dry dock floor and placed on a metal pallet
• The topside was sandblasted and primed
• Pad eyes were welded to the hull for lifting the dome
• A few days later the dome was pushed into position under the vessel for installation
• 4 chain falls were used to hoist the dome onto 2 long guide studs
• Over night Gus noticed that a gap was visible on the front edge of the flanges
• The next day with the help of Wayne chain falls were placed under the front of the dome and tightened up. The gap did not close up till the aft nuts were loosened. This shifted the gap to the aft of the flange.
• Then 4 chain falls and a chain fall to the center lifting eyed in the sonar manhole were tensioned up and the nuts backed off and re-torqued.
• There were still gaps at this time on the fore and sides of the flange.
• On the interior of the flange down in the sonar well the two flanges mate up tight except for on small spot where a 3 thousands feeler gauge can be inserted a short way.

Sonar Dome Mating Problems

At this point an email from the beach intonated that we had pinched and O-ring when installing the dome. The o-ring was firmly in its groove and was not moving upon installation. It was inspected just before mate up and was good.

A response was written up as follows:

While cleaning up the sonar dome after the removal by divers, Gus noticed that there was marine growth on between the flanges of the dome. If the dome had been installed flat, as you've indicated in your email, there would have been no room for growth to form.
During this installation of the sonar dome, the oaring was sitting in the groove and checked just before the mate up of the two flange surfaces. There was no indication of the oaring coming out of the groove. After torqueing up the flange to the specified torque, a gap was noticed between the two flange surfaces. The following day was spent trying to remedy that gap.
It appears as if the flange on the hull side warped during the weld up. This is backed up by the marine growth that was found on the flanges. We now have two contact spots approximately 140° apart on the flange. It is possible to close up the gap on either side of the contact points, but not both sides. The sonar dome essentially rocks between the two contact points.
On the inside, the gap between the supposedly flush flange is almost non-existent. In one spot, a 3 thousandths feeler gauge can be inserted between the flanges. The rest of the way around is flush. We have good photographs of this.
The contact points are metal to metal. The hull side flange appears to be slightly warped and cupped. It looks as if the o'ring is making a good seal at the flange. We are in the process of replacing all the o'rings in the O'Brien connectors with new o'rings and will conduct another pressure test after that's completed. (There was a small leak on one of the connectors).
At this point there is nothing to be gained, by dropping the sonar dome unless our pressure test fails. The pad eyes that were welded to the hull for the installation have been removed by the shipyard. This happened despite a request to leave them in place.
At present we have conducted successful pressure test to 15 psi. The transducer wiring has been replaced in the bulkhead junction box.
The ship is now wet and no problems as of this date. The sonar was tested at dock and is operational as of November 26.

The Gus Report

Gus
Summary
Transit time between Busan, Korea and Subic Bay, Philippines was utilized to prepare laboratory spaces for arrival at Keppel shipyard and dry dock facilities.

• Temporary wood security bulkheads with doors were erected to limit access to various areas by unauthorized personnel. Monitors, computers and related items were removed from public spaces and all spaces made secure.
• Numerous counter tops in the core deck labs were refinished.
• Preparations were also undertaken for removal of the sonar dome by shipyard-supplied divers before entering dry dock. Due to one of the lifting eyes and corresponding socket in the dome having damaged threads as noted during the Lisbon dry dock a lift plate with pad eye was fabricated for the dome mounting flange giving the dome 5 lift points. The damaged lifting eye threaded pin was replaced.
• Cooling for the Cryo-magnetometer was changed over from the ships chill water system to a stand- alone Haskris chiller unit in anticipation of the ships chill water system going down while in dry dock.
• The magnetometer and cable were prepared for shipment to manufacturer for repairs.
• VIT winch in the moon pool area and deck equipment on the poop deck were covered with plastic sheeting to help protect against dust and grit from abrasive blasting.
• Missing acoustic rubber on the sonar dome was replaced with of anti-fatigue matting and lifting eye socket threads in the dome were chased. The 3.5 transducer array mounting plate was removed for a visual inspection of the dome cavity. Marine growth on and around all transducers and acoustic foam were hand scraped and cleaned then taped and covered with plywood for protection prior to blasting, painting and reinstallation.
• While in dry dock o-rings were replaced on all O-brian connectors and the dome mounting flange and the dome reinstalled and pressure tested.
• The chemistry lab mbio area counters and cabinets were removed for deck repairs.
• The x-ray lab Haskris chiller was removed for deck repairs under the unit and around the foundation and the lab deck was refinished.
• The bridge deck office spaces and meeting area were cleared of all furniture and the decks and passageways refinished. Most furniture and equipment has been moved back into the various spaces.
• Several minor maintenance issues were attended to in the thin section lab.