 In addition, many Coast Guard Auxiliarists are qualified radio watchstanders at existing Coast Guard stations.Most Coast Guard land-based VHF radio stations do not use three-letter call signs as the larger communications stations do; instead, they identify themselves by the activity name, such as "Sector Baltimore", "Station Washington, D.C. (or Station Washington)".All Cutters (CG vessels 65 feet in length or greater) have four-letter international radio call signs, such as USCGC "Citrus"/NRPQ.