A system configured for monitoring a maritime environment, the system being arrangeable on a maritime vessel, the system comprising: a plurality of radio detection and ranging devices (101, 103, 105) being configured to perform a synchronous detection of an object on a water surface or above a water surface in the maritime environment, to transmit a plurality of sensor signals respectively relating to a location of the object in the maritime environment over a communication network, and to receive a synchronization signal, the synchronization signal indicating a reference time, a reference frequency, or a reference phase, each radio detection and ranging device (101, 103, 105) being configured to synchronize its operation according to the synchronization signal with regard to the reference time, the reference frequency, or the reference phase, to synchronously generate a transmit signal upon the basis of the synchronization signal, to transmit the transmit signal towards the object in the maritime environment, to receive a reflected signal, the reflected signal forming a reflected version of the transmit signal, and to generate a sensor signal upon the basis of the transmit signal and the reflected signal; a synchronization source being configured to generate the synchronization signal for synchronizing operations of the plurality of radio detection and ranging devices (101, 103, 105), and to provide the synchronization signal over the communication network to the plurality of radio detection and ranging devices (101, 103, 105); and a processing device being configured to receive the plurality of sensor signals from the plurality of radio detection and ranging devices (101, 103, 105), and to determine the location of the object in the maritime environment upon the basis of the plurality of sensor signals; characterised in that the plurality of radio detection and ranging devices (101, 103, 105) comprises a surveillance radio detection and ranging device and a man-over-board radio detection and ranging device, and wherein the surveillance radio detection and ranging device and the man-over-board radio detection and ranging device are arranged to form an outstation or a cluster. a plurality of radio detection and ranging devices (101, 103, 105) being configured to perform a synchronous detection of an object on a water surface or above a water surface in the maritime environment, to transmit a plurality of sensor signals respectively relating to a location of the object in the maritime environment over a communication network, and to receive a synchronization signal, the synchronization signal indicating a reference time, a reference frequency, or a reference phase, each radio detection and ranging device (101, 103, 105) being configured to synchronize its operation according to the synchronization signal with regard to the reference time, the reference frequency, or the reference phase, to synchronously generate a transmit signal upon the basis of the synchronization signal, to transmit the transmit signal towards the object in the maritime environment, to receive a reflected signal, the reflected signal forming a reflected version of the transmit signal, and to generate a sensor signal upon the basis of the transmit signal and the reflected signal; a synchronization source being configured to generate the synchronization signal for synchronizing operations of the plurality of radio detection and ranging devices (101, 103, 105), and to provide the synchronization signal over the communication network to the plurality of radio detection and ranging devices (101, 103, 105); and a processing device being configured to receive the plurality of sensor signals from the plurality of radio detection and ranging devices (101, 103, 105), and to determine the location of the object in the maritime environment upon the basis of the plurality of sensor signals; characterised in that the plurality of radio detection and ranging devices (101, 103, 105) comprises a surveillance radio detection and ranging device and a man-over-board radio detection and ranging device, and wherein the surveillance radio detection and ranging device and the man-over-board radio detection and ranging device are arranged to form an outstation or a cluster.