|University of New Hampshire; Center for Coastal and Ocean Mapping/Joint Hydrographic Center|
July 23, 2021
Lat: 45.613° N, Long: 57.237° W
Winds: West at 21 knots
Sea State: 1.0-1.5 meters
Yesterday at 14:00 local time, the Canadian Coast Guard Ship (CCGS) Louis S. ST-Laurent (LSSL) pulled away from the dock at the Bedford Institute of Oceanography (BIO) in Dartmouth, Nova Scotia. For the next 11 days the hydrographic team on board the CCGS Louis S. ST-Laurent will head east and north, across the Atlantic Ocean, towards Tromsø, Norway collecting bathymetric data under the provision of the Atlantic Ocean Research Alliance.
Our team, which consists of researchers from Fisheries and Oceans Canada’s Canadian Hydrographic Service (CHS), the Marine Institute of Memorial University of Newfoundland, and the University of New Hampshire, spent the first 24 hours at sea settling into the survey routines We reviewed our multibeam (MB) data acquisition procedures in the MB office. On the quarter-deck we familiarized ourselves with the procedure of deploying Expendable Bathythermograph (XBT) probes. We will also be using Expendable Conductivity, Temperature and Density (XCTD) probes. The the information we receive from them is used to measure how the sound bends as it travels through the water columns (refraction) in order to ensure correct depth readings. And some of us worked on getting our sea legs.
During the first 24 hours we collected over 520 kilometers of multibeam data.