A waterborne vessel includes a monitoring system configured to monitor the plurality of offshore properties such that the waterborne vessel is configured to respond to an alert signal transmitted from at least one of the plurality of offshore properties when the monitoring system receives the alert signal. An offshore security monitoring system includes the waterborne vessel and a base module deployed at each of the plurality of offshore properties. A security monitoring method may include monitoring the security of the plurality of offshore properties by the monitoring system of the waterborne vessel according to various embodiments, receiving an alert signal from the at least one of the plurality of offshore properties, and responding to the alert signal. A security monitoring unit includes, a plurality of waterborne vessels according to various embodiments, and a control center in communication with the plurality of waterborne vessels.