Regal 3300 Owner's Manual page 45

Safety On Board
Garbage
The Act to Prevent Pollution from Ships places limitations on the
discharge of garbage from vessels. It is illegal to dump plastic trash
anywhere in the ocean or navigable waters of the United States. Also,
it is illegal to discharge garbage in the navigable waters of the United
States, including the Great Lakes. The discharge of other types of
garbage is allowed outside certain specified distances from shore as
determined by the nature of that garbage.
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