August 10 - August 17, 2006
August 11, 2006
Arrival and First ROV Dive
Our dive today was ultimately successful in exploring the canyon site, examining some hydrate samples, and calibrating the laser Raman system in situ. We were able to find exposed outcrops even larger than the ROV in size and attempted to drill out samples using our coring tool with limited success. The manipulator arm was able to break off some moderately-sized pieces and place them into a Pyrex viewing chamber with an open bottom. The ROV then lifted back towards the surface to determine the decomposition depth (pressure/temperature) of the methane hydrates.
Finally, the DORISS laser was calibrated at depths ranging from 850 to 200 meters for wavelength and intensity. Tomorrow, we will begin a more thorough investigation of the site, including using PUP (Precision Underwater Positioner) for fine-tuned focusing on the exposed hydrate.