In addition to the RSOVs with their crew-served weapons, each Ranger battalion has two medical variants of the Defender known as a
Medical Special Operations Vehicle (MEDSOV). Instead of the weapon mounts found on standard RSOVs, the MEDSOV variant has fold-down racks capable of carrying six litter patients. Along with its transported casualties, a typical MEDSOV crew would include a driver, a TC and two or three medics to treat the wounded. Another RSOV variant is used by the Ranger battalion
mortar platoon. Known as MORTSOVs, the platoon's two Defenders—they also have three
Humvees—replace the top-gun configuration with storage boxes and
guy wires that allow the vehicle to carry thirty mortar rounds along with the extra equipment required by the platoon. In addition to its on-board carrying capacity, the MORTSOVs can be used to tow the platoon's mortars. A RSOV communications variant is also used. ==Users==