I'm looking at photos of the 75th Rangers and notice that many (but not all) have the AN/PRC-148 radio mounted on their lower left pack connected to a handset on their chest rig and then their headset in the helmet.
Does anyone know what the exact role of these are? Are they mainly for interplatoon or intraplatoon communication? How many would one expect to see in a Ranger platoon and operated by which members?
Here's a link to a photo:
http://expedino.com/wp-content/uploads/2014/01/US-Army-75th-Ranger.jpg