+--------------------------------------------------------------------------+ | ATLANTIS CRUISE SYNOPSIS | +--------------------------------------------------------------------------+ Voyage - Leg: AT 15-23 Voyage Dates: 11-28 September, 2007 Chief Scientist(s): Keir Becker (Becker/DiIorio) Address: Becker - University of Miami - RSMAS 4600 Rickenbacker Causeway Miami FL 33149 DiIorio - University of Georgia Department of Marine Sciences 250 Marine Sciences Bldg. Athens, GA 30602 Phone: Becker - 1-305-421-4661 DiIorio - 706-542-7020 Email: kbecker @rsmas.miami.edu daniela @uga.edu Cruise Objective: Becker - Servicing operations at 7 CORK sites in NE Pacific: DiIorio - Sample the hydrothermal vent plume of Grotto in the Main Endeavour vent Field and to recover and redeploy two acoustic scintillation moorings Science Activities: Most of the 12 Becker dives will be in the 1026B/1027C/1301A/B area, which can be covered with a single 2-transponder net. The other three sites each would require just one dive each, primarily for data downloads as in many past Alvin operations. At the 1026B/1027C/1301A/B area, operations will include the following: 1. Delivery of cement into the 1301A/B wellheads. This will be similar to the efforts on two Alvin dives in Sept 2006 (AT15-10), except that we will probably use expendable cementers that do not require complex rigging for recovery. 2. Exchange of data loggers and wellhead osmosampler units at the 4 wellheads, similar to Alvin operations in 2005 (AT11-32). 3. Data downloads using underwater-mateable connectors as in the 2005 program. 4. A likely attempt to recover the sensor string from 1026B (about 500 lbs total weight). This would utilize Alvin to mate up a latching tool on a spectra line to the surface, then (after Alvin recovery) a science-provided winch to pull the sensor string out of the hole to the ship. Alvin would also be required to install a plug in the hole (~50-100 lbs) on a subsequent dive. Di Iorio The science objectives are to sample the hydrothermal vent plume of Grotto in the Main Endeavour vent Field and to recover and redeploy two acoustic scintillation moorings. Moorings will be recovered by acoustic release mechanism and serviced on board the ship. Redeployment will be to some drop location and Alvin will locate moorings using the Homer probe, and place the moorings to previous locations using previous anchors as markers - all instrumenation on the moorings are Alvin certified to 2242 m. Direct sampling involves video and acoustic imaging of the plume, plume temperature as a function of height, temperature as a function of 100m spatial distance around Grotto, plume water samples for particle concentrations and size distribution at approximately 20-30 m above the vent orifice. Navigational data for Alvin is required. (JD 6/18) Operations Area: 7 CORKs (plus Di Iorio mooring site) 12 days on station (Becker), 3 days on station (Di Iorio) 2400-2700 meters depth Hole 857D, Middle Valley, 48*26.517'N, 128*42.651'W, 2421 m Hole 1024C, Cascadia Basin, 47*54.531'N 128*45.005'W, 2612 m Hole 1025C, Cascadia Basin, 47*53.247'N 128*38.919'W, 2606 m Hole 1026B, Cascadia Basin, 47*45.759'N 127*45.552'W, 2658 m Hole 1027C, Cascadia Basin, 47*45.387'N 127*43.867'W, 2656 m Hole 1301A, Cascadia Basin, 47*45.209'N 127*45.833' W, 2658 m Hole 1301B, Cascadia Basin, 47*45.229'N 127*45.826'W, 2658 m Departure Port: Astoria, Oregon Agent: Master R/V Ship Name Attn: Scientist's Name c/o Ship Service Co. 968 Commercial St. Astoria, OR 97103 Contact: Lou Marconeri Phone: (503) 325-3721 Fax: (503) 325-4109 Cell: (503) 791-0796 Email: [1]lmarconeri@knutsenins.com Send large packages to: R/V Ship Name Attn: Scientist's Name c/o Port of Astoria Foot of Portway Astoria, OR 97103 Arrival Port: Aberdeen, Washington Agent: TBD SHIP Installed or Transponder for wire work Normally Deionized Water Syste Carried Fume Hood Equipment: Refrigerator -70 Degree Freezer Doppler/GPS Navigation ADCP - (JD 6/18) CTD/ Rosette 23X10L - Conductivity, temperature, pressure (JD 6/18) Seabeam (JD 6/18 WHOI-Provided Equipment: Science H. Jannasch to provide rope and suitable winch for planned instrument recovery at 1026B. He has been in direct contact with E. Party-Provided Caporelli about details. - Becker Equipment: Ship electrical power for cement mixer and Jannasch winch needed. Notes: Night work anticipated - DiIorio Di Iorio - Each mooring weight in water is approximately 35-40 kg. Each mooring consists of syntactic foam float (30in, 250lbs buoyancy), acoustic scintillation RX (or TX) (63kg in water), Oceano acoustic release (22kg in water), anchor/chain (45 kg in water)Each mooring weight in water is approximately 35-40 kg. DiIorio - Mooring Equipment has been pressure tested at WHOI Pressure Test Facility (JD 8/7) DiIorio - One Tow-Yo CTD cast after mooring recovery (JD 8/7) Han Jannasch - Cementing operations email (JD 8/16) As time keeps moving, I've modified Tom's original cement delivery system by having it land on the top of the CORK thus allowing the cement to run straight down through the now 15 ft tube. I've attached a pdf showing the system and an excel spreadsheet calculating deployment weights and deployment scenarios. [2]ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-23%20Becker%20DiIorio/Cementing%20Ops/Becker_CementBucket3.pdf [3]ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-23%20Becker%20DiIorio/Cementing%20Ops/Becker_CementCalcs.xls Several specifics: 1) Although the container is still a 55g drum, it could be repalced with a taller pipe or a cement jacket as I previously described. 2) I've added an agitator so that Alvin can remobilize a partially gelled cement and get it to flow (the BJ summary mentions that gelling mixtures can be remobilized by agitation). You can either grab a monkey fist on the lever (more force) or grab the handle at the shaft and rotate the wrist (faster). 3) I have not yet added places to connect drop weight(s), which I will depending on your preference. 4) I've included two elevator approaches, one using all drop weights and flotation, and the second one using less weight and flotation by using an optional latch mechanism to keep everything from floating away as the cement runs out (outlined in the attached spreadsheet). One advantage of the second approach is that if the cement gells before trying to pour it, the unit can be removed from the wellhead by Alvin. I'll be interested to see which approach you prefer. 5) I have not made the stand droppable because I'm afraid that it could damage instrumentation if it should fall in an uncontrollable way. 6) As you had requested, I am hoping to have a system ready for us to go over in Astoria next Friday (Aug 24th). ALVIN/JASON Installed or Normally Major Water Sampler - Becker & DiIoiro Carried Equipment: High Temperature Probe - Becker & DiIoiro Low Temperature Probe Digital Still Camera - Oriented Forward Search Sonar - Becker & DiIoiro Profiling Sonar - DiIorio Doppler/GPS Navigation USBL Navigation - DiIorio (JD 6/18) CTD - DiIorio(JD 6/18) - (calibrated within last 2 years)(JD 8/7) Science Party-Provided Note that we will supply syntactic floats and Equipment: weights for the necessary elevator work.- Becker Underwater-mateable connectors @<10 lbs as in past Alvin operations.- Becker Laptop computers @5-10 lbs. We have three units already gas-certified. - Becker Notes: USBL and doppler/GPS navigation for potential work at 857D, 1024C, and 1025C with search sonar but without LBL transponders - Becker Other Notes: Will ask co-investigators H. Jannasch and C.G. Wheat to supply list of any chemicals to be used. SSSG Tech: sssg @atlantis.whoi.edu Navy Clearance Granted 09/05/07: Status: WITHIN 5 NM RADIUS OF 47-45N, 127-45W DURING PERIOD 110700Z THRU 280700Z SEP 07 WITHIN 5 NM RADIUS OF 47-54N, 128-42W DURING PERIOD 110700Z THRU 280700Z SEP 07 WITHIN 5 NM RADIUS OF 48-26N, 128-43W DURING PERIOD 110700Z THRU 280700Z SEP 07 WITHIN 5 NM RADIUS OF 47-57N, 129-06W DURING PERIOD 110700Z THRU 280700Z SEP 07 Check List: Required? Comments US Customs Form No Diplomatic Clearance Yes Canada Isotope Use Approval No SCUBA Diving No Last Modified: 09/07/2007 References Visible links 1. mailto:lmarconeri@knutsenins.com 2. ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-23%20Becker%20DiIorio/Cementing%20Ops/Becker_CementBucket3.pdf 3. ftp://ftp.whoi.edu/pub/marine/cruisefiles/Cruise%20Info/ATLANTIS/AT15-23%20Becker%20DiIorio/Cementing%20Ops/Becker_CementCalcs.xls