Additional observations while cruising the GICW (Gulf Intracostal Waterways) and the Western Rivers:

1) Rope: 1/4", 3/8", & 1/2"
2) Line: 1 1/2", 2", & 3"
3) Milk Crates
4) Life jackets
5) 55gal Drums (mostly new ones)
6) Steel & plastic buoys
7) Destroyed Light structures & associated equipment (woden platforms, solar panels, batteries & boxes, lights, steel light stands, plywood dayboards)
8) Old tires
9) Fishing gear (yo-yo's, fishing line/quipment in tree limbs)

This is what comes off the top of my RAM.
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QMC, USCG (Ret)
The best luck is what you make yourself!