I am posting this as a friend of the family below. They are finishing
out their now-ruined vacation in cottages on dry land.

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Beware!!

Carbon Monoxide Poisoning on Houseboat

An extended family of 16, ages 2 through 63, was treated for Carbon
Monoxide poisoning at Livingston Regional Hopital, Livingston TN, on
August 2nd, 2004. Poisoning occurred aboard the "Starship II"
houseboat, rented from Eastport Marina and Resort located on Vail
Hollow Lake, TN. The Tennessee Wildlife Resource Agency and the US
Coast Guard are currently investigating the incident.

BC