单项选择题 The（）is that search and rescue authorities ashore, as well as shipping in the immediate vicinity of the ship in distress, will be rapidly alerted to a distress incident so they can assist in a coordinated SAR operation with the minimun delay.

单项选择题 （）communication are intership VHF radio telephone communication.

单项选择题 From IMO’S point of view, INMARSAT’s most important function is the provision of（）.