The Collins TCS radio series, used extensively by the US Navy during World War II, is a renowned line of shipboard communication equipment known for its durability, reliability, and clear signal transmission.

Designed by Collins Radio Company, the TCS units operated on both AM and CW modes, covering HF frequencies ideal for ship-to-ship and ship-to-shore communications. These rugged sets typically featured separate transmitter and receiver units, and were prized for their modular, serviceable design—making them a staple aboard smaller vessels and auxiliary ships.

Today, Collins TCS radios are highly sought after by collectors, restorers, and military radio enthusiasts for their historical value and engineering excellence.