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26-03-2010, 19:15
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#1
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Registered User
Join Date: Dec 2008
Location: FL West Coast
Boat: 38 Down Easter
Posts: 50
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Weird Noises in the Water...
Ok, I didn't know where to put this. We are currently anchored at Jack Point at Gasparilla Island and we have been hearing the strangest sounds. It sounds like a diesel motor that is pinging really bad. It gets loud and then goes quiet. Yes I looked. There is not a boat for a long way off. We are about 200 yards off the shoreline toward the middle of the anchorage. My wife seems to think that it is electricity in the water but I'm not convinced that is what it is. I would love to hear what some of you may have to say about it. I know we will only be here for one night... lol Not so sure I will be able to sleep. I keep thinking I'm gonna get hit by a tug boat... LOL
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26-03-2010, 19:19
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#2
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Registered User
Join Date: Oct 2008
Location: Princeton, NJ
Boat: Challenger Anacapa 42
Posts: 2,097
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It's snapping shrimp. See here: Alpheidae - Wikipedia, the free encyclopedia They sound like popping right up against the hull...like the water is electrified...
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26-03-2010, 19:24
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#3
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Registered User
Join Date: Dec 2009
Posts: 2,959
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Occam Razor would say it is a "diesel motor that is pining really bad". Sound travels a long long way underwater. In Mexico we heard shrimpers, which are pulling at full power, far over the horizon. Perhaps 10 miles. But bugs and mammals make noise too. It's not electricity, but I'm not going up against wife-science.
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26-03-2010, 19:40
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#4
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Registered User
Join Date: Dec 2008
Location: FL West Coast
Boat: 38 Down Easter
Posts: 50
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Ok, I looked into the shrimp theory. While those are really cool and loud. I'm not convinced that they are the culprit. While a long off diesel in Charlotte Harbor could be more like the guilty party. When we were anchored in the Florida Canal (you know, the one they almost killed the water system with....) we thought that rocks were bouncing off our hull due to a really fast current. In fact we do believe that the Shrimp in question were the culprit. I think I will just turn up the stereo for a bit.
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26-03-2010, 19:53
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#5
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CF Adviser Moderator Emeritus
Join Date: Dec 2006
Location: Montrose, Colorado
Posts: 9,845
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__________________
"Your vision becomes clear only when you look into your own heart. Who looks outside, dreams; who looks within, awakens."
Carl Gustav Jung (1875-1961)
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26-03-2010, 22:28
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#6
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Eternal Member
Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
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I always love the sounds when I am down inside a boat working....reminds me of those old WWII sub movies.
I thought it would be humorous to put a big underwater speaker down in a marina and hook it up to the hailer and either talk or play rap music. Or whale sounds....in the Chesapeake.
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26-03-2010, 23:37
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#7
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Registered User
Join Date: Oct 2005
Posts: 6,185
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It never failes to amaze me how far away I can hear another boat when down below. And it sounds loud too; like it's five feet off the bow when it's really a hundred yards away.
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27-03-2010, 04:45
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#8
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Registered User
Join Date: Apr 2008
Location: Massachusetts
Boat: Morgan OI 30' Itinerant
Posts: 254
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Columbians?
Either its a diesel working far off...did you see the TV show re drug dealers building submersible boats where just the intake and exhaust vents break the surface? I doubt anyone would confuse shrimp w diesels. I first heard shrimp in Rhode Island's Sonnet river last summer. It was baffling until we figured it out but definetly not confused w diesels.
__________________
A man who is not afraid of the sea will soon be drowned, he said, for he will be going out on a day he shouldn't. But we do be afraid of the sea, and we only be drowned now and again.
J.M.Synge, in The Aran Islands
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27-03-2010, 06:38
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#9
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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There are many sources, some of them:
- cavitation on a passing ship,
- shrimps,
- fish.
In my place now it is fish. They will wake you up 5 a.m. scrubbing just next to your ear ...
b.
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27-03-2010, 21:44
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#10
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Registered User
Join Date: Mar 2008
Location: Oceanside, Ca.
Boat: Islander Freeport 36
Posts: 576
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the shrimp make a snapping or crackling sound, not a pinging sound.
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28-03-2010, 04:17
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#11
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Registered User
Join Date: Jan 2009
Location: where ever my anchor is
Boat: 28' Bristol Channel Cutter - Angelsea
Posts: 277
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Record it with your iPhone and post the file.
__________________
Gary Shanti's blog
"two wrongs don't make a right, but three lefts will get you back on the freeway"
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28-03-2010, 05:11
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#12
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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I went to the shrimp info page and found the shrimp is also cavitation. (!!!)
Reading the record on the shrimp one can only wonder what sort of damage they may be making to our precious hulls ???
b.
OK - ;-)))
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28-03-2010, 05:15
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#13
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Registered User
Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,131
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MAYBE--diesel-powered snapping shrimp I need my
__________________
so many projects--so little time !!
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07-04-2010, 12:23
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#14
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Registered User
Join Date: Dec 2008
Location: FL West Coast
Boat: 38 Down Easter
Posts: 50
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Well, I'm not 100% on what it was... We moved south to the York Island anchorage and heard it there. That's over 20 miles away from the last anchorage!?!? When we moved up river to Ft Myers, it was gone. I'm guessing due to the fresh water content. So.....Maybe it is shrimp!... Or maybe: Shrimp on Diesel Harley Davidsons!... LOL
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