ZCZC TF67 211710 UTC APR OOSTENDERADIO MSI 172/26 BE EEZ SHOREBASED VTS CENTRE ZEEBRUGGE DECREASED SERVICE LEVEL VTS WANDELAAR APPROACH KAN 60 TEMPORARY NOT RESPONSIVE DURING RADAR ASSISTANCE ON VHF 4 VTS RADAR ZEEBRUGGE VHF 19 IS CLOSED VTS RADAR CONTROL ZEEBRUGGE VHF 4 IS CLOSED EXCEPT FOR LNG CARRIERS NNNN