题目内容
Without the permission of _________, a ship earth station can not access the INMARSAT system.
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The frequency 518kHz will be used to transit _________ and _________ warnings in NAVTEX.
In addition to meeting the requirement of Sea area Aland A2, every ship engaged on voyage in Sea area A4shall be provided with _________.
A distress alert can be relayed from an RCC by
The satellite communication requirements of chapter _________ of the 1974 SOLAS Convention can be met, either wholly or in part, by INMARSAT MESs capable of two-way communications.
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