Checkout LIME: https://github.com/marcotcr/lime presumably in this example when reviewing the test dataset you'd see the ocean light up more than the warships.
E.g. Here is an example of a wolf (ship) detection system that is actually detecting snow (area of the ocean) https://youtu.be/hUnRCxnydCc?t=58
E.g. Here is an example of a wolf (ship) detection system that is actually detecting snow (area of the ocean) https://youtu.be/hUnRCxnydCc?t=58