Repeatable mounts take all advantages of detachable mounts to a new level. All the advantages of detachable mounts, which are:
Such mounts are ideal for hunting rifles, where you can use the same rifles with different optics on many different types of hunts. The perfect combination of different optics on one rifle can be described in this fashion:
You can add as many different optics to this setup as you wish, since this is the main concept of repeatable mounts. Easy transportation of optics and rifle separately is only an additional bonus.
There are however many different types of repeatable mounts, of which the most common are:
There are also many other similar repeating mounts.