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Boat Forum / Cruising / January 2005weird clicking noises when boat motionless
Whenever my boat's at anchor or in slip at night, I hear weird rapid and random clicking noises coming from, I think, the bottom of the boat. It's sort of the sound of pop rocks on your tongue or really loud champagne bubbles or of pop corn popping in the microwave (but not that loud). Somebody told me it was barnacles feeding. Is that right? It doesn't happen when the boat is moving and I don't remember if it happens in the day. >Whenever my boat's at anchor or in slip at night, I hear weird rapid and >random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] >happen when the boat is moving and I don't remember if it happens in the >day. It's shrimp - at least my boat doesn't have barnacles on the bottom. If you use the toilet at night without turning on the light and you are using water from outside the boat to flush, you can see phosphorescence in there too. grandma Rosalie >>Whenever my boat's at anchor or in slip at night, I hear weird rapid and >>random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 6 lines] >> >It's shrimp - at least my boat doesn't have barnacles on the bottom. As to the question of whether you can hear it during the day - it depends on how many shrimp and how quiet it is, and also on the species - when they feed etc. I first heard this noise when snorkeling off St. John USVI. So I think if you swim in the water, you can hear this also even during the day. I think it may be one of the ways that dolphin find the shrimp. >If you use the toilet at night without turning on the light and you >are using water from outside the boat to flush, you can see >phosphorescence in there too. > >grandma Rosalie grandma Rosalie For the record the boat is in San Diego Bay. > Whenever my boat's at anchor or in slip at night, I hear weird rapid and > random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] > happen when the boat is moving and I don't remember if it happens in the > day. >For the record the boat is in San Diego Bay. > [quoted text clipped - 6 lines] >> happen when the boat is moving and I don't remember if it happens in the >> day. The old wooden ferry at the San Diego waterfront museum had that noise when I visited a few years ago. The docent said it was a kind of tiny shrimp common in the harbor. Rodney Myrvaagnes NYC We have achieved faith-based science, faith-based economics, faith-based law enforcement, and faith-based missile defense. What's next? Faith-based air traffic control? > For the record the boat is in San Diego Bay. My boat is in Sydney, Australia and I get that noise at night too. > > Whenever my boat's at anchor or in slip at night, I hear weird rapid and > > random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] > > happen when the boat is moving and I don't remember if it happens in the > > day. > Whenever my boat's at anchor or in slip at night, I hear weird rapid and > random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] > happen when the boat is moving and I don't remember if it happens in the > day. You have heard the mysterious sound of biological noise. Shrimp or other creatures on your hull. The first time I took our Navigator south from MA to Florida, I started hearing the clicking/popping sound as we got south of Norfolk, VA. The engine room of the Navigator is fully insulated and I thought at first that the sound was the insulation adhesive on the inside of the hull popping as the water temperature was slowly increasing. Initially, I could only hear it when I went into the engine room to check oils, etc, but by the time we got to St. Augustine, FL, I could hear it faintly in the main stateroom. Being my first long distance trip in a new boat, I was obviously getting very concerned, thinking the hull was cracking or some stupid thing, until my brother called me from the dock while we were tied up in St. Augustine. I went over to where he was and he told me to listen to the hulls on some of the other boats. They were all cracking and popping. We stopped also in Titusville, FL and were talking to the harbormaster on duty. He was an old timer and entertained us with all kinds of sea stories, shuttle launch stories and other interesting tales. I happened to mention the cracking and popping and he explained it was a biological noise - most likely shrimp - and that I was only one of hundreds that had asked him about the noise over the years. Eisboch > I happened to mention > the cracking and popping and he explained it was a biological noise - most > likely shrimp - and that I was only one of hundreds that had asked him about > the noise over the years. > > Eisboch I guess it's a question as old as sailing itself. I've been asking myself the same question now for years :-) We're in a slip on Harbor Island, and hear the same thing. Guess I have an answer now. Keith Hughes >>I happened to mention >>the cracking and popping and he explained it was a biological noise - most [quoted text clipped - 7 lines] > > I guess it's a question as old as sailing itself. > I've been asking myself the same question now for years :-) We're in a > slip on Harbor Island, and hear the same thing. Guess I have an answer > now. > > Keith Hughes And I'm on the Rock River in Northern Illinois. Have always heard the same noise when anchored and assumed here that it was rocks rolling along the bottom or carp feeding on the algae (or whatever) that builds up on the bottom of the boat. Tom. Shrimp? Must be "popcorn" shrimp! TDS S/V Cimba > Whenever my boat's at anchor or in slip at night, I hear weird rapid and > random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] > happen when the boat is moving and I don't remember if it happens in the > day. They're called "Brine Shrimp", and when our boat was moored at Harbor Island, we heard them too. Other noises you may hear in San Diego bay are "Croakers" (a species of fish) and Harbor Seals (as they swim under your boat to catch fish). Every once and a while, you may also hear the Dolphns that the Navy trains for their "Special Ops" (they sometimes take the dolphins down the channel behind Harbor Island.  SignaturePaul =-----------------------------------= renewontime dot com FREE email reminder service for licensed mariners http://www.renewontime.com =-----------------------------------= If they're brine shrimp that means they're SEA MONKEYS!! Her: Honey what are those popping noises coming from outside? Me: Those are sea monkeys. Her: No really sweetheart, what are those noises? Me: Sea Monkeys Her: I'm serious!! Me: SEA MONKEYS!! > They're called "Brine Shrimp", and when our boat was moored at Harbor > Island, we heard them too. Other noises you may hear in San Diego bay are > "Croakers" (a species of fish) and Harbor Seals (as they swim under your > boat to catch fish). Every once and a while, you may also hear the Dolphns > that the Navy trains for their "Special Ops" (they sometimes take the > dolphins down the channel behind Harbor Island. "renewontime dot com" <noone@nospam.com> : > Every once and a while, you may also hear the Dolphns > that the Navy trains for their "Special Ops" (they sometimes take the > dolphins down the channel behind Harbor Island. Where do people get these crazy ideas from? The very idea that the Navy trains dolphins belongs in woo-woo land! Please try to get your facts right in the future. The dolphins are training the Navy to give them free fish! :) Now you know where your tax dollars are going. :) Earl Colby Pottinger SignatureI make public email sent to me! Hydrogen Peroxide Rockets, OpenBeos, SerialTransfer 3.0, RAMDISK, BoatBuilding, DIY TabletPC. What happened to the time? http://webhome.idirect.com/~earlcp Quick, tell the Navy they are in woo-woo land. http://www.navytimes.com/story.php?f=1-292925-1715834.php > "renewontime dot com" <noone@nospam.com> : > [quoted text clipped - 8 lines] > > Earl Colby Pottinger > Quick, tell the Navy they are in woo-woo land. > > http://www.navytimes.com/story.php?f=1-292925-1715834.php Well, that story just proves that the Dauphins are training the navy to give them fish! Jim >> Quick, tell the Navy they are in woo-woo land. >> [quoted text clipped - 4 lines] > >Jim And brush their teeth for them! -- Larry Email to rapp at lmr dot com >> Every once and a while, you may also hear the Dolphns >> that the Navy trains for their "Special Ops" (they sometimes take the >> dolphins down the channel behind Harbor Island. > > Where do people get these crazy ideas from? Sorry Earl, crazy as it may seem, it's all true. I'm a retired Lieutenant Commander from the US Navy, and back in the 70's and 80's trained dolphins were referred to (this was Top Secret info back then) as the "Mark 8", used for anti-swimmer and anti-mine defense. One of the ships I served on used the "Mark 8" several times in training exercises. The holding pen for the dolphins and harbor seals that the Navy trains is just to the North of Shelter Island. If you've ever sailed there, I'm sure you've seen them. In fact, just about everyone that's ever sailed San Diego Bay has seen the Special Ops folks driving Boston Whalers with a -blue foam triangular- carrier on deck, that's what they transport the dolphins with. Shortly after declassifying the project, the Navy announced that they were going to disband it, but as far as I know, the pens, the animals and the program are still active. This is not to say that I condone this use/misuse of our waterborne friends, I'm just telling you that it is being done. SignaturePaul =-----------------------------------= renewontime dot com FREE email reminder service for licensed mariners http://www.renewontime.com =-----------------------------------= >>> Every once and a while, you may also hear the Dolphns >>> that the Navy trains for their "Special Ops" (they sometimes take the [quoted text clipped - 4 lines] >Sorry Earl, crazy as it may seem, it's all true. I'm a retired Lieutenant >Commander from the US Navy, /// >This is not to say that I condone this use/misuse of our waterborne friends, >I'm just telling you that it is being done. Hmmm...someone didn't read the dolphin post quite well enough, I'd say? :-) Brian W Actually, some of the first Navy casualties in the current Neocon experiment were dolphins clearing mines in southern Iraqi ports. I have a feeling that they would much rather be catching their own fish. They are much better at it than the Navy is.. SignatureGlenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com > "renewontime dot com" <noone@nospam.com> : > [quoted text clipped - 9 lines] > > Earl Colby Pottinger They're 'pistol shrimp'. One of their claws is small, and the other is rather large, and one of the joints in the big claw cavitates, so I've heard, when they operate it. I've heard them in Marina del Rey as well as in San Diego Bay. Tom Dacon > Whenever my boat's at anchor or in slip at night, I hear weird rapid and > random clicking noises coming from, I think, the bottom of the boat. It's [quoted text clipped - 4 lines] > happen when the boat is moving and I don't remember if it happens in the > day. I dont belive it could be Shrimp as we get that noise in New Zealand in places where there are no shimp. I have noticed that this noise only occurs in harbours with a sandy or muddy floor but not with a rocky bottom. Other theorys have been that they are small crabs on the seabed I heard the sound you are describing in San Carlos, Sonora, Mex every night for 5 months. Theories were rampant and jolly. My first night it was the newly formed blisters popping on my 25 yr old fiberglass hull. By morning I had revised my neurotic twitterings and the first soft golden rays of sunlight revealed a man of Science and Reason strutting about the dock with an electrical kit checking the polarity of every meter convinced an Advanced Electrolysis Theory, which had obviously made a massive battery out of the whole harbor, was desolving every metal fastening on the boat. The cruiser's net consensus, as well as the local fishermen, supported the shrimp idea if I remember and nothing terrible ever happened. |
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