A cargo monitoring system comprising a controller and an image-capturing device for capturing a first image of cargo in response to a first signal from the controller. The system includes a sensor for taking sensor readings in relation to the cargo and for transmitting the sensor readings to the controller. The controller is configured to send a second signal to the image-capturing device to cause the image-capturing device to capture a second image of the cargo if the controller determines from the sensor readings that a cargo-damaging event has occurred.