Ocean Tracking Network

The Ocean Tracking Network (OTN) is a global aquatic research, data management and partnership platform headquartered at Dalhousie University in Nova Scotia, Canada. OTN deploys acoustic and satellite tags, oceanographic tools, and marine autonomous vehicles (gliders) in significant ocean and inland water sites globally. These gliders can travel long distances for months at a time, collecting data on ocean variables such as temperature, depth, salinity, and currents. This data, combined with information on animal movements, helps to understand the impact of ecosystem changes on marine life. In 2020, OTN's technical abilities grew with the inclusion of remotely operated vehicles (ROVs) and side-scan sonar systems.

OTN is involved in a variety of initiatives, ranging from shark tracking for beachgoer safety to supporting community-led tracking of commercial species. The organization also contributes to the design of marine-protected areas (MPAs) and transboundary fisheries management. OTN acoustic receivers are positioned around 800 m apart on the ocean floor, creating a “listening line.” These receivers can also be attached to existing structures or floating buoys. When an animal with an acoustic tag enters the receiver's range, it records the tag's acoustic signal. The receiver logs the tag's ID, along with timestamps and sensor data from the tag, aiding researchers in addressing study inquiries. As of August 2023, the company has reportedly tracked over 344 species across 1,135 global projects and has deployed more than 2,787 OTN receivers in key aquatic locations across 138,936 kilometers.