can you define "navigable waterways"

per legal dictionary . com

Lakes and rivers are generally considered navigable waters, but smaller bodies of water may also be navigable. Attempting to address years of problematic litigation, the U.S. Supreme Court in 1979 created four tests for determining what constitutes navigable waters. Established in Kaiser Aetna v. United States, 444 U.S. 164, 100 S. Ct. 383, 62 L. Ed. 2d 332, the tests ask whether the body of water (1) is subject to the ebb and flow of the tide, (2) connects with a continuous interstate waterway, (3) has navigable capacity, and (4) is actually navigable. Using these tests, courts have held that bodies of water much smaller than lakes and rivers also constitute navigable waters. Even shallow streams that are traversable only by canoe have met the test.