FMI 6-02.45, C1 Signal Support to Theater Operations (May 2008) - page 7
Theater LandWarNet Equipment Overview
extended range (skip node) communications. The AN/TRC-170(V)2 (see Figure B-10) replaces the AN/TRC-132 TROPO. The AN/TRC-170(V)3 (see Figure B-11) replaces the AN/TRC-112/121 TROPO.