Study GroupsRadiocommunication Study Group 5Working Party 5B – Maritime mobile service including Global Maritime Distress and Safety System (GMDSS); aeronautical mobile service and radiodetermination service – (WP 5B) Working Party 5B – Maritime mobile service including Global Maritime Distress and Safety System (GMDSS); aeronautical mobile service and radiodetermination service – (WP 5B)
