The aim of this guide is to assist crew members in obtaining The Long Range Radiotelephone Operator’s Certificate, (LRC). This is the radio operator’s licence required to operate the High, Medium and Very High Frequency (VHF) radio equipment fitted to R.N.L.I. Lifeboats and other vessels that are not required to compulsory fit GMDSS equipment under the SOLAS convention. These vessels are commonly known as non-compliant vessels.