Week 2

August 21, 2015

Collecting data around the clock

Returning to our operational schedule, our crew is beginning to prepare for our departure from Gjoa Haven later today. The helicopter will be picking up passengers at the Gjoa Haven airport later this afternoon, so we have some time left to finish up some local operations before heading out.

Tim Janzen, Hydrographer-in-charge

With light winds and temperatures that reached almost 10℃, the CHS survey launches Gannet and Kinglett were deployed from the Laurier into the water first thing this morning.  The small boats are equipped with multibeam sonar technology and are used to conduct 100 percent coverage, seabed bathymetric surveys.  We carry the boats onboard each night on our well deck, and they are lifted in and out of the water regularly by the deck crew using the ship's heavy lift derrick (main hook of 20-tonnes).   The Gannet had some work done on her outdrive (part of the boat's propulsion system) a few days ago by the Laurier's engineering crew, and seems to be working well. With the remote work that we do, it's important that the Laurier is well-equipped for any type of mechanical issue that might arise, so we have a lot of tools, parts and expertise onboard. As well, the Hydrographer-in-charge, Tim Janzen has also made sure to bring many boxes of spare parts, so Gannet wasn't down for long.

This year, Parks Canada added a multibeam sonar system on their Research Vessel (RV) Investigator,as part of their search efforts for HMS Terror. And since multibeam is the tool used for seabed surveys and nautical charting, Parks Canada's search efforts will now be able to contribute to the collection of bathymetry. The Government of Nunavut archaeology team lent direct support to that effort today as well by collecting multiple ground-based LiDAR scans of the Parks Canada's Investigator on the ship's well deck. In turn, the LiDAR information will be used to calibrate the vessel to CHS standards.

Hydrographers prepare the CHS multibeam system for deployment from CCGS Sir Wilfrid Laurier, with Parks Canada's Research Vessel (RV) Investigator on the ship's well deck

CCG crew begin deployment of pole-mounted multibeam aboard CCGS Sir Wilfrid Laurier

Later tonight, we conduct transits back and forth between Gjoa Haven and Simpson Strait using the portable multibeam system, mounted to a retractable pole on the Laurier itself, to collect more seabed data. The hydrographers are working around the clock too, processing the data in real-time as the information is collected.  With such a limited amount of time to collect this type of data, every moment is precious.

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