16.3 Radio installations

16.3.1 Table 1 illustrates the minimum radio installations to be carried by an existing vessel sailing at different distances from a safe haven.

Radio Equipment	Distance from safe haven - nautical miles
Radio Equipment	Up to 30	Up to 60	Up to 150	Unlimited
VHF Radio telephone with Digital Selective Calling (DSC)	One	One	One	One
MF/HF Radio Telephone with Digital Selective Calling (DSC)	None³	None³	One¹	One¹
INMARSAT Ship Earth Station	None	None	One¹	One¹
NAVTEX receiver	None	None	One²	One²
Notes : 1. An INMARSAT Ship Earth Station OR a MF/HF radiotelephone with DSC may be fitted for operations over 60 miles from a safe haven. When a vessel operates north of 70 degrees North, or south of 70 degrees South, an INMARSAT Ship Earth Station and MF/HF is required due to lack of coverage also, IRIDIUM is recommended. 2. If the vessel is sailing in an area where an international NAVTEX service is not provided then the NAVTEX receiver should be supplemented by an INMARSAT enhanced group calling system. 3. For existing vessels it is strongly recommended that MF/HF DSC or INMARSAT option is fitted to cover the sea area outside of A1.

16.3 Example:

As an illustration, the minimum equipment to be installed on an existing vessel operating worldwide would be:

one VHF radiotelephone with DSC;

one INMARSAT –C ship earth station;

one NAVTEX receiver;

one MF/HF radiotelephone with DSC.

Note The requirements for the carriage of two way radiotelephone sets, EPIRBs and SARTs are given in chapter 13, table 1. EPIRBs for vessels operating in Sea Area A4 are to be capable of operating through the polar orbiting satellite service in the 406 MHz band.

16.3.3 Table 2 illustrates the minimum radio installations to be carried by new vessels and on vessels subject to major conversion. This fulfils the distress and safety communication functions for voyages in Sea Areas A1, A2, A3 and A4.

A1	A1+A2	A1+A2+A3		A1+A2+A3+A4
A1	A1+A2	either	Or	A1+A2+A3+A4
NAVTEX¹	NAVTEX¹	NAVTEX¹	NAVTEX¹	NAVTEX¹
VHF (DSC) Radiotelephone	VHF (DSC) Radiotelephone	VHF (DSC) Radiotelephone	VHF (DSC) Radiotelephone	VHF (DSC) Radiotelephone
– – –	MF (DSC) Radiotelephone²	MF (DSC) Radiotelephone	MF/HF (DSC) Radiotelephone²	MF/HF (DSC) Radiotelephone²
– – –	– – –	INMARSAT C Ship Earth Station	MF/HF (DSC) Radiotelephone²	MF/HF (DSC) Radiotelephone²
	Notes: 1 If the vessel is sailing in an area where an international NAVTEX service is not provided then the NAVTEX receiver should be supplemented by an additional means of receiving MSI transmissions such as the Inmarsat enhanced group calling system. 2 Incorporating direct-printing telegraphy or an alternative means of receiving MSI transmissions in the Sea Areas in which the vessel is operating. The requirements for the carriage of two way radiotelephone sets, EPIRBs and SARTs are given in Section 13, Table 1. EPIRBs for vessels operating in Sea Area A4 are to be capable of operating through the polar orbiting satellite service in the 406 MHz band.