OTN Halifax Line Is Extended to 60 km Offshore

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Thomas Fullager (Dominion Diving) set to deploy Kintama float mooring assembly on Halifax Line Photo by Colin Buhariwalla (Acadia U)

On March 28 and 29, 2011, the OTN deployment team in collaboration with personnel from Fisheries and Oceans Canada’s Bedford Institute of Oceanography and Acadia University extended OTN’s Halifax Line to 72 receiver stations, from just 37, an additional distance of almost 30 km. The Halifax Line now extends almost 60 km offshore.

Peter Smith (DFO-BIO), principal investigator for the Halifax Line, worked closely with local silver hake and pollock fishers to design placement of the Halifax Line.

The aim was to avoid areas of heavy trawling as well as concentrations of fixed gear fisheries. In addition, receivers are housed in a new trawl-resistant mooring assembly design in an effort to minimize the potential for damage to both trawl nets and OTN equipment.

Also deployed at one of the receiver stations on the Halifax Line is a benthic pod. This oceanographic instrument, designed by local ocean technology company Satlantic, Inc., will measure temperature, depth, salinity, and dissolved oxygen, and transmit the data to an attached receiver. Using Vemco’s new technology VR4 receiver, data can be uploaded from the benthic pod at regular intervals via the receiver’s acoustic modem without the need to recover the pod.

 

Additional images from the Halifax Line extension can be found in the OTN Multimedia Gallery.

Story by Susan Dufault, OTN Headquarters

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