Message in a Bottle
From Ultima Online Forever Wiki
Description
Message in a Bottle (MIB) is the Treasure Map of the high seas. When you look inside the bottle, you will find either a Waterstained SOS 
or, less commonly, an Ancient SOS 
. Within the message, you will find coordinates to a sunken treasure chest. You will need at least 65 Fishing to have a chance of pulling up the chest. Some patience may be required to fish up the chest, you may find many an old boot before you hit the jackpot. It is generally recommended that you collect a few MIBs and then group them up by location before sailing out.
