Complex sentence: The Rigid Raider (RRC) & Inflatable Raiding Craft (IRC) Royal Marine Commandos operate a large number of these types of craft, deploying them in amphibious and riverine operations in environments ranging from the Arctic to the tropics.
Split into simpler sentences: The Rigid Raider (RRC), and the smaller Inflatable Raiding Craft (IRC). As such, the RCs often find themselves deployed in amphibious and riverine operations around the globe, in environments ranging from the Arctic to the tropics.