Wally the crawler now sits among hydrate outcrops 867m below sea level. He's tethered to the Barkley Hydrates instrument platform by a 70m extension cable festooned with flotation blocks to keep it off the seafloor and away from Wally's tractor treads.
Wally's equipment includes:
conductivity-temperature-pressure gauge
webcam and lights
methane sensor
compass
After transporting Wally to the seafloor, ROPOS set out markers around a hydrate mound and along a pathway to be followed over the coming months and years. Then ROPOS unwound the extension cable and connected it to the instrument platform. This platform also connects, via a 1430m extension cable, to our Barkley Canyon Axis instrument platform.
We have yet to test Wally in operation, but hope to have an opportunity to power him up and go for a test drive sometime soon!
Wally's Ocean Adventure Begins
Wally the benthic crawler dangles over the water beneath ROPOS, 27 August 2009. (Full-resolution version.)
Wally in position, with floating tether, 28 August 2009.
Waypoint marker 10 on Wally's seafloor observation route. Waypoint 1 can also be seen in the distance.
Some unknown prankster added a message to Wally's back end.
Wally on the seafloor, just after arrival. The extension cable is festooned with foam buoyancy blocks, which will prevent Wally from getting entantled. Waypoint markers float at Wally's port side.
Seafloor environment typical of the hydrates fields where Wally the Crawler was positioned.
Wally the benthic crawler rigged and ready for deployment. It's green extension with attached flotation blocks rests on the green frame. Waypoint markers dangle from weighted chains at Wally's side.
NEPTUNE Canada contractors Jason Williams (left) and Jonathan Lee prepare Wally for deployment, 26 August 2009.
ROPOS and R/V Thompson crews work together during deployment of Wally the Crawler to our Barkley Hydrates study zone.
Wally the benthic crawler dangles over the water beneath ROPOS, 27 August 2009.
Wally the benthic crawler hangs in the water, held by a strap on ROPOS, 28 August 2009.