Mike... you lucked out. Sounds like a very good lesson learned.
REMEMBER: THERE IS
ALWAYS SOMETHING GUARDING THE TREASURE
For the new river diver or the divers starting out, I will list my perspectives of river diving cautions in order of level of danger:
1. Ascending and being hit by a sailboat (they make no noise)
2. Surfacing behind, or drifting passed, an empty dive boat. There should always be at least one person aboard but things do not always work out that way.
3. Backing unaware into an unstable mud cavern. This is really creepy.
4. Being hit by a extremely fast boat. Or a boat with a very intoxicated, uncaring, driver. This has happened in the Cooper River. The diver was killed.
5. Finding yourself "in" or drifting uncontrollably into a known alligators territorial area.
6. Extremely fast current.
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Recommendations for river diving:
1. Don't get in the water if it is TOO fast or in a known alligator's territory
2. Fly a DIVE FLAG and keep someone on the boat at all times.
3. Always work towards to bottom/center of the river.
4. Listen for boat motors before ascending.
5. Stay away from unstable undercuts and caverns.
6. When preparing to ascend, send a tethered safety sausage to the surface above you.
7. Overweight yourself, take back up lights, take trauma shears, line cutter, and serrated edge knife
8. Be prepared to reverse your ascent given an indicator of trouble.
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Here is a gift for the shark tooth hunters reading this thread.
Megalodon Tooth
Where it was found
The site