표 1. | Table 1. GMDSS 도입 전후의 해상 통신 장비의 변화 | Changes in maritime communication equipments before and after the introduction of the GMDSS.

Wireless equipment	Before GMDSS	After GMDSS
Radio equipment(capable of responding to a distress signal)	VHF Ch. 16	VHF Ch. 16
		VHF DSC (Ch. 70)
	MF/HF SSB	MF/HF SSB
		MF/HF DSC
	Morse radiotelegraph	MF/HF NBDP
Distress position indicating equipment	Direction finder	SART, EPIRB
On-scene communication equipment	-	Two-way VHF
MSI receiving equipment	-	NAVTEX, EGC receiver
Maritime satellite communication equipment	-	Inmarsat