Recycle used oil. Never discharge sewage into the water. Use sewage pump-out facilities. Keep away from nesting birds. They may become agitated and leave their nests if you intrude.
Litter is unsightly, it can hurt animals, and littering is against the law.
If you see litter, pick it up Each year, over 50,000 birds and mammals are killed because they eat or are strangled by plastics that we dump in the ocean.