RECOMMENDATION ITU-R S.1587 - Provisional technical characteristics of earth stations on board vessels operating ... ANNEX 1 - Provisional technical characteristics of ESVs operating in the frequency band 5 925-6 425 MHz ... 1 Introduction 2 Description of deployed ESV systems and their operations 2.1 Description of ESV systems 2.2 Antenna subsystem 2.3 RF subsystem 2.4 Digital/modem subsystem 2.5 Terminating capability 2.6 Description of ESV hub function 3 Operational characteristics of typical ESVs operating in the 5 925-6 425 MHz frequency band 3.1 In general: three distinct operational phases 3.2 ESV operations in open sea 3.3 ESV operations in stationary mode 3.4 ESV operations in motion 3.5 Dual band operation 4 ESV technical characteristics ANNEX 2 - Provisional technical characteristics of ESVs operating in the frequency band 14-14.5 GHz ... 1 Antenna subsystem 2 RF subsystem 3 Modem subsystem 4 ESV technical characteristics ANNEX 3 - Provisional technical characteristics of ESVs in shared bands