I'm a dealer for Dakota if you need Dakota's.
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Most all of them do that in the 50-75' range, the entire boat shudders inside.
The ONLY yacht that REALLY scared the SH$# out of me in a relatively calm sea 2-4' off the stern 1/4 was a Marlow. We were at 16 knot cruise and...
Poseidon marine blinds in Fort Lauderdale has always been fairly priced and they did a great install on a few yachts I manage.
Blue silicone will most likely collapse with those bends. I'd stick to wire bound marine wet exhaust hose.