I hope you make to Fl., the weather is UNBELIEVABLE this year!! BUT, if you are thinking about opening another Marina, especially in SW Fl., then be prepared for a good fight! Please read this article http://www.savethemanatee.org/taleecty2.htm
Take care, and hope to see that sweet Phantom running around down here.
BTW, Now that I'm on my Manatee Soap box, check this out:
CAPTAIN TOM McGILL, P. E.
254 Sykes Point Lane
Merritt Island, FL 32953
October 28, 2001
An open letter to Save the Manatee Club
Dear Club Manatee:
I’ve been reading the propaganda on your web site regarding whether manatees “hear very well.” You state, “Anatomically, manatees have extremely large ear bones and may have a good sense of hearing.” I’m glad you said, “may,” because at the low end of the frequency spectrum, manatees don’t hear very well, but they do hear up to 46 KHz, which is way beyond human hearing. Their lower frequency drop off is ~ 400 Hz compared to 50 Hz for humans. That means they have great difficulty hearing noises that are very common in their environment such as slow moving boats. Of course the volume of sound is also important for the manatee to discriminate between a noise source and the ambient noise in its environment, and slow moving boats put out low amplitude and low frequency noise.
Drs. Gerstein and Blue are eminent scientists who know about the science of acoustics and the acoustic environment in which the manatees live. Dr. Gerstein is the only scientist who has directly measured and confirmed the audiogram of the manatee. He has received praise from well-respected scientists who are involved in acoustics and mammal research. Dr. Blue’s credentials in acoustics are impeccable. All other methods, such as anatomical evaluation of the manatee’s ear structure, must be evaluated against the audiogram developed by Dr. Gerstein. This information about the manatee’s hearing ability has existed since 1997, yet Club Manatee has refused to accept it. Interestingly, there are no scientists within Club Manatee that have any understanding of the acoustical hearing of the manatee or the noise in the manatee’s environment, but that doesn’t stop them from putting out misleading information about such.
The irony is that Club Manatee argues against the very science that could provide a win-win solution. They oppose Drs. Gerstein and Blue’s approach, but don’t have one scintilla of scientific fact to refute it. They are as the proverbial person whose mind is made up and nothing can change it. Fortunately, truth usually rises to the surface, and all the propaganda from Club Manatee can’t change the fact that manatees collide with motorboats for reasons that have never been properly considered or discussed. Those collisions are why many manatees have scars from multiple encounters with slow moving boats. Manatees are not dumb nor are they slow and lethargic. They collide with slow boats because they don’t hear them and the boat operator doesn’t see the manatee. There are several other factors involved in this scenario, but the most important is that manatees have great difficulty hearing slow moving vessels.
Captain Tom McGill
[ 02-01-2002: Message edited by: Dean Ferry ]