Discharge from Type I can go directly overboard
So you would not need a holding tank to hold the discharge from it unless you visit a "no discharge" harbor or marina. To my knowledge, they are few and far between anywhere on the west coast, especially in the PNW. When checking, don't just take other boat owners' word for it...it's surprising how many aren't even aware that treatment device exist...they think the only choices are illegal direct discharge or a holding tank, which in their minds makes their waters "no discharge."Actually, 90% of "no discharge" waters aren't on the east coast either, they're on inland waters. Except for RI, several areas in MA waters, and the new marine sanctuary off Key West (and, I BELIEVE, Destin harbor in the Gulf), they're as hard to find on the east coast as on the west coast.