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Jun 7, 2010

May 2010 Cruise Recap

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Our Spring 2010 installation & maintenance cruise sailed May 8-24 aboard the CCGS John P Tully. It was a very busy time for 4 Ocean Networks Canada staffers, 2 contractors, 1 student and 1 Canadian Navy officer who joined 8 ROPOS crew members and the 21-member CCGS Tully roster. In the space of 16 days we completed 21 ROPOS dives at 5 locations, including one dive to the Fraser Delta site in the Strait of Georgia.

Our itinerary during the May 2010 installation and maintenance cruise.

Over the course of our journeys, we deployed 11 new instruments, installed 2 new instrument platforms, retrieved-refurbished-redeployed 5 instrument platforms, recovered a handful of instruments and platforms, and gathered samples from 6 seafloor sites in Barkley Canyon. All cruise objectives were accomplished, including 3 high-priority tasks:

  1. Recovery of the malfunctioning Vertical Profiler System from Barkley Upper Slope
  2. 12.5km extension cable lay and bottom pressure recorder deployment at ODP 1027 (Cascadia Basin)
  3. Installation of a replacement instrument platform and multibeam sonar at ODP 889 (Clayoquot Slope)

Weather played a significant role during this cruise as well. We were delayed by strong winds and high seas for 91 hours over the course of our 16-day cruise, including a 41-hr stint when stormy conditions forced us to seek shelter in Bamfield, BC.

NEPTUNE Canada offers a hearty Thank-You! to the crews of ROPOS and the CCGS John P Tully, as well as the able hands of our contractors and support people. This cruise could not have been accomplished so successfully without their help!

Installation Diary: 8-24 May


8 May

CCGS Tully.

After operations tests in Saanich Inlet, the CCGS Tully sailed to the VENUS Strait of Georgia site to help diagnose a power problem with the VENUS Delta Dynamics Laboratory.
 

9-10 May

Octopus.

We made three dives at ODP 889 in order to swap out the instrument platform there and install a new auxiliary instrument platform connected to the broadband seismometer.

10 May

Lasers illuminate ROPOS manipulator.

We retrieved two instrument platforms from Barkley Canyon, benthic pods 3 and 4, which were installed last fall and have been in service for 8 months. Both platforms arrived in fairly good condition, and most instruments were ready to return to the deep after a quick clean-up on deck. Several instruments, however, did not survive their seafloor odessy.

11-13 May

Corky the Octopus.

Over the course of a marathon 27-hr dive we installed a new siesmometer auxiliary platform, inspected the ODP 1027 instrument platform and nearby CORK, laid a 12.5km extension cable and installed the Cascadia Basin NE Bottom Pressure Recorder.

14 May

Rockfish emerges from VPS float.

On 14 May 2010, Ocean Networks Canada, ROPOS and CCGS Tully crews worked together to retrieve the POGO vertical profiler system from its seafloor location, 396m below the surface on Barkley Slope. Both Tully and ROPOS crews were highly effective in their various roles executing this complicated and potentially dangerous operation.

15 May

Life forms are both richly varied and densely clustered upon the rocky promontories of Folger Pinnacle.

On 15 May 2010, we made two dives in Folger Passage, once to Folger Deep and a second dive to Folger Pinnacle. During these dives we swapped out the Folger Bottom Pressure Recorder, found and marked the end of the cable extending from the node up to Folger Pinnacle and cleaned up our little mess from last year.

16-17 May

Skate in Barkley Canyon Axis.

Over the course of a head-spinning 2-day, 5-dive frenzy we fetched 3 instrument platforms, re-deployed 4 instrument platforms and collected samples from 4 different locations. The action was so quick, it was sometimes hard to know whether we were coming or going!

18 May

Sonar at ODP 889.

On 18 May 2010, we revisted ODP 889 to install an Imagenex multibeam sonar. With it, scientists hope to study plumes of methane gas that bubble from the seafloor in a portion of the Bullseye Vent called Bubbly Gulch.

19 May

Shell experiment.

We paid a quick visit to Wally the Crawler's gas hydrate world in Barkley Canyon. Our tasks were to deploy one experiment, retrieve another, collect some clams and give Wally some TLC. Wally the Crawler has been busy over the past 8 months, and it was time for a little clean-up.

21 May

Shortspine King Crab next to SFC Apparatus.

On Friday, 21 May 2010, we made two dives to retrieve instruments from the seafloor at both ourODP 889 and ODP 1027 locations. From ODP 889 we retrieved a Pore Fluid Array and the Seafloor Compliance apparatus. From ODP 1027, we retrieved a malfunctioning seismometer auxiliary platform.

23 May

ROPOS with tool tray.

After a long weather delay, we finally completed our last 2 dives of this cruise on 23 May 2010 at Barkley Canyon. During a sunrise dive we retrieved a string of temperature probes from a gas hydrates outcrop. After returning to the surface, ROPOS then dove again to deploy Barkley Benthic Pod 2 together with a new sediment trap.

 

expedition | CCGS John P. Tully | installation | cork | cascadia basin | clayoquot slope | folger passage | Octopus | barkley canyon | ROPOS

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