November 1, 2016 MARITIME AND PORT AUTHORITY OF SINGAPORE ISSUES SHIPPING CIRCULAR NO. 23 OF 2016
This circular informs on the implementation of revision of frequencies and channelling arrangement for the maritime High Frequency (HF) and Very High Frequency (VHF) made by the World Radiocommunication Conference 2012 (WRC) to appendices 17 and 18 of the Radio Regulations.