I&#x27;m reading this and wondering why you couldn&#x27;t build a waterproof beacon?  At least by tracking it you could prove that it didn&#x27;t exit into Lake Superior.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Underwater_locator_beacon" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Underwater_locator_beacon</a><p><a href="http:&#x2F;&#x2F;www.rjeint.com&#x2F;aviation-underwater-locator-beacons" rel="nofollow">http:&#x2F;&#x2F;www.rjeint.com&#x2F;aviation-underwater-locator-beacons</a>