Seaworthy? How about float-worthy? She hasn't moved in 50 years, from what I can gather.
When they did some extensive maintenance to the Intrepid a few years ago, they had to tow her to the yard. She had been there (Manhattan Pier 86) I think around 25-years, about half the time as this one. Unfortunately, when they tried to move her she wouldn't budge because of the silt and mud that had built up over that period of time. It took over a month just to drudge enough material to allow her to actually float away.
That problem is probably exponential worse with the Olympia.