Canadian Hydrographic Services Hudson Bay
Canadian Hydrographic Services MBES Survey, Hudson Strait & SW Hudson Bay, Canadian Arctic Proposed Shipping Routes & Inspection/Observation of benchmarks
IHO S-44 Special Order (<50m) and 1a Multibeam Survey to Canadian Hydrographic Service Specifications covering six areas within Hudson Strait and eastern Hudson Bay in the Canadian Arctic. The survey encompassed over 930sqkm and included locating and observations on three very remote benchmarks. The project utilized the 120' Leeway Odyssey for 24hr operations, refueling and resupplying every three via pre-arranged fuel barges and goods pre-purchased in local communities. Keel Geospatial provided hydrographic surveying and data processing services for IIC Technologies as a subcontractor on the project.
A Norbit i77h with integrated OceanMaster IMU was mounted on the Odyssey, with AML SVPs providing sound velocity information multiple times per day. The survey consisted of shallow and mid-water depths (20-250m), backscatter, and included obstruction investigations. The survey itself was undertaken on the ellipsoid, and for positioning Trimble's PPRTX solution was utilized (Applanix POSPac). The ship’s launch was used to go ashore for benchmark obs.
Multibeam data was field cleaned during acquisition to ensure quality and density by the Lead Surveyor. The field cleaned and ancillary data was then transferred during shift changes to our processing offices and our subcontractor where final cleaning and processing was performed (using CARIS HIPS) and 1m, 2m, & 5m surfaces generated (using CARIS HIPS). These were delivered along with raw and processed survey data. The backscatter was mosaiced, rendered, and included as a deliverable. Final deliverables were reviewed by the Data Processing Manager, signed off by the Lead Hydrographer, and submitted to CHS. A Mobilization and Calibration was provided at the start of the survey, and a Report of Survey and the Benchmark Report was submitted at the end. IIC also was responsible for submitting Navigational Warnings to appropriate authorities as soon as they were observed during acquisition. Acquisition took six weeks in the Arctic, final data 2 months.