I was watching Generation Kill and the Lt. raised his sniper on the radio with 'Hitman 2-2 Echo 5 Romeo'. Why is there an additional 'E5R' after the callsign and what does
![Generation Kill: Devildogs, Iceman, Captain America, and the New Face of American War (English and Norwegian Edition): Wright, Evan, Lawlor, Patrick Girard: 9798200127931: Amazon.com: Books Generation Kill: Devildogs, Iceman, Captain America, and the New Face of American War (English and Norwegian Edition): Wright, Evan, Lawlor, Patrick Girard: 9798200127931: Amazon.com: Books](https://m.media-amazon.com/images/I/81aHg2zlq6L._AC_UF1000,1000_QL80_.jpg)
Generation Kill: Devildogs, Iceman, Captain America, and the New Face of American War (English and Norwegian Edition): Wright, Evan, Lawlor, Patrick Girard: 9798200127931: Amazon.com: Books
![Original Film Title: GENERATION KILL-TV. English Title: GENERATION KILL-TV. Film Director: SIMON CELLAN JONES. Year: 2008. Credit: HBO / SCHIRALDI, PAUL / Album Stock Photo - Alamy Original Film Title: GENERATION KILL-TV. English Title: GENERATION KILL-TV. Film Director: SIMON CELLAN JONES. Year: 2008. Credit: HBO / SCHIRALDI, PAUL / Album Stock Photo - Alamy](https://c8.alamy.com/zooms/6/b895b81e19f945f9a747b245d51a8c95/p2hjbc.jpg)
Original Film Title: GENERATION KILL-TV. English Title: GENERATION KILL-TV. Film Director: SIMON CELLAN JONES. Year: 2008. Credit: HBO / SCHIRALDI, PAUL / Album Stock Photo - Alamy
![Generation Kill" A Burning Dog (TV Episode 2008) - Mike Figueroa as Sgt. Leandro 'Shady B' Baptista - IMDb Generation Kill" A Burning Dog (TV Episode 2008) - Mike Figueroa as Sgt. Leandro 'Shady B' Baptista - IMDb](https://m.media-amazon.com/images/M/MV5BZWFlNjQ5YjQtN2U2NS00ODFlLTlkNTUtMTEzMDRhYTY1NWJiXkEyXkFqcGdeQXVyNDIzMzcwNjc@._V1_UY1200_CR751,0,630,1200_AL_.jpg)