A separating toilet is one that sends the urine to one place, and the solids somewhere else. By keeping them separate, we are spared the aromas most-often associated with the traditional outhouse. A separating toilet uses no water, so it is well-suited to off-grid locations, as well as in R/Vs, boats, cabins, or even in an outhouse.
Incorrectly called "Composting Toilets" by some, there is no active composting of materials in the toilet. The contents, instead, can be composted in a dedicated bin.
Separating toilets can cost $1000 to purchase, so many DIYers make their own, using a purchased "Urine Diverter". What makes my design unique is my urine diverter design, which costs about $3. As with all Backwood Basics products, this one is inexpensive, functional, simple to build, and decent to look at.