Navigable waters of the United States are those waters that are subject to the ebb and flow of the tide and/or are presently used, or have been used in the past, or may be susceptible for use to transport interstate or foreign commerce.
The Signs & Symptoms of Friedreich's Ataxia are: 1  loss of coordination (ataxia) in the arms and legs. 2  fatigue - energy deprivation and muscle loss.  vision impairment, hearing loss, and slurred speech.
About one in 50,000 people in the United States have Friedreich's ataxia. Most individuals have onset of symptoms of FA between the ages of 5 and 18 years. Adult or late onset FA is less common, <25% of diagnosed individuals, and can occur anytime during adulthood.