Prysmian RFOU(C) 2×2×1.5 mm² is a halogen-free, mud- and fire-resistant marine instrumentation cable with two twisted pairs under a common (collective) screen and a 15.5 mm outer diameter. The 1.5 mm² tinned-copper conductors carry control and signal circuits on ships and offshore installations complying with IEC 60092-350/376. The grey outer sheath denotes general (non-IS) circuits.