Context: please provide short answer of following question
Question: How do technologies like AIS, SAR, and satellite-based images contribute to maritime surveillance?
Answer: Technologies such as AIS, SAR, and satellite-based images contribute significantly to maritime surveillance by enabling the tracking and monitoring of vessel movements. AIS provides real-time data on vessel positions and movements. SAR and satellite images, on the other hand, offer a broader view, covering large areas of the ocean and enabling continuous monitoring, even in conditions where optical images may not be available. Together, these technologies improve the efficiency of maritime operations by allowing authorities to keep track of ships and respond quickly to potential threats or irregularities.