Thales Nederland today announces that it has received a contract for two Seastar and Gatekeeper sensors, that are to be delivered and installed on the two multi-purpose M-class frigates of the Belgian Navy. The modernisation will take place in 2011 and 2013 in the scope of the M-frigates' upkeep programme. The Seastar and Gatekeeper sensors provide the vessels with the capability to detect small targets encountered during missions, and to counter frontier-running, pollution, drugs trafficking and piracy. The two new sensors will be matched with the tried-and-true SMART-S surveillance radar and the STIR weapon control radar that are on board of the M-frigates. Based on the cooperation between the Dutch and the Belgian Navy, this contract was already an option in the contract that Thales concluded in 2008 with the Royal Netherlands Navy, and that provided for the delivery of the Seastar and Gatekeeper sensors to the two M-class frigates of the RNLN. Seastar is a non-rotating active phased array radar for naval surface surveillance. The system automatically detects and tracks asymmetric threats and very small objects such as swimmers and periscopes in all weather conditions. Seastar can also be used for helicopter guidance. Seastar is internationally marketed as Sea Watcher 100. Gatekeeper is a 360° panoramic electro-optical surveillance and alerter system based on IR/TV technology. Designed to counter emerging asymmetric threats down to small boats and swimmers, Gatekeeper increases short-range situational awareness in littoral environments.