- The TRR-27 provided 5 radio intercept positions. Each position had 2 R-390A~URR receivers, and manual typewriter, also known as a "mill".
- One position also had a tape recorder (possibly an AN/TNH-11)
- Photo of TRR-27 operator position with 2 receivers and mill:
- TRR-27 cut away drawing:
- TM 32-5895-217-14&P Sept.1980
- TM 32-5895-217-14&P-HR Sept 1980