Unlike household toilets, which are all pretty much the same, marine toilets come in different shapes and sizes and have different flush mechanisms and tank options, so you can design a system that works for your boat, budget, and cruising plans. While the emphasis here will be on what’s available in marine heads, this is also the time to take a look at what the experts refer to as the marine-sanitation-device system. New, high-quality, sanitation-grade hoses, a clear vent hose, and a new or scrubbed-out holding tank will go a long way to ensuring that the system operates as efficiently and as free of odor as possible. If replacing your head and related sanitation gear is in your future, you may want to consider an upgrade to an electric head, a vacuum head, or even a composting head. Or if you’re on a tight budget, you can always go back to basics, so to speak.