Fishermen off Molokai find dock that may be from tsunami debris

Fishermen spotted what appears to be a large floating dock off Molokai.
A warning to mariners has been issued by the Coast Guard about a large cement floating dock drifting in Hawaiian waters — possibly from the 2011 Japanese tsunami debris.
The dock, about 50 feet long by 30 feet wide, was last seen Wednesday about 15 miles north of Molokai.
Maui fishermen discovered the dock that had Japanese writing on it and brought it to the attention of government agencies.