The estimated range of a non-optical electromagnetic transmission.
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The estimated range (distance) assumes 'in vacuo' transmission and a standard antenna height of 5 metres. Thus it gives a hint to the mariner whether he is likely to receive transmission at a certain distance from an object carrying this attribute.
On behalf of the IHO Member States, the International Hydrographic Bureau would like to thank Korea Hydrographic and
Oceanographic Agency(KHOA) of the Republic of Korea for giving active support in the development of the S-100 GI Registry