The invention provides a system and a method for detection of oil spills and icebergs at sea and for aiding the navigation of ship traffic to avoid collisions between ships and icebergs. A constellation of polar orbiting satellites is used to determine the position of icebergs and oil spills within an observation area, and this information is transmitted to a data processing center which also receives information concerning the position of ships within the observation area. The data processing center uses this information to evaluate the likelihood of collisions between ship and icebergs and sends warning signals to the ships, alerting them to the danger. The data processing center also correlates the position of ships and oil spills to determine the likely cause of the latter.
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