Don't always trust navigation buoys
I found the following on the Trinity House website:
Whilst working off St.Ives, on the North Coast of Cornwall, on Sunday 19 January, the crew of the Trinity House Lighthouse Service vessel, THV MERMAID, captured a navigation buoy, which was drifting in the water.
Once onboard, the crew noticed that the 20 ft, red and white safe water mark bore the inscription "Property of USCG", the acronym for the United States Coast Guard.
Following investigations by the staff of the Trinity House Operations Control Centre, in Harwich, Essex, the United States Coast Guard confirmed that the buoy was reported missing from its assigned position off the North Carolina coast, in January 2002. The wayward buoy had drifted approximately 3,250 miles across the Atlantic Ocean before its capture by the crew of THV MERMAID.
In view of the high cost of transportation, the United States Coast Guard do not want the buoy returned to the United States.