Propagation data for terrestrial maritime mobile services operating at frequencies above 30 mhz




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Rec. ITU-R P.616

RECOMMENDATION ITU-R P.616*

PROPAGATION DATA FOR TERRESTRIAL MARITIME MOBILE SERVICES
OPERATING AT FREQUENCIES ABOVE 30 MHz

(Question ITU-R 203/3)


(1986)

Rec. 616

The ITU Radiocommunication Assembly,



considering

a) that there is a need to give guidance to engineers in the planning of terrestrial maritime mobile radio services in the VHF and UHF bands;

b) that the factors affecting propagation in terrestrial maritime mobile services, including those in harbours, coastal areas and inland waterways, may differ from those associated with other services in these bands;

c) that propagation data are needed for different types of maritime environment and specifically for vertical polarization;

d) that field-strength curves are given in Annex I of Recommendation ITU-R P.370 for oversea paths in certain maritime areas,
recommends

1. that the curves given in Annex I of Recommendation ITU-R P.370 be used provisionally for the planning of the terrestrial maritime mobile service recognizing the particular conditions to which they apply;

2. that provisionally, field strengths over mixed land and sea paths be calculated by the methods described in Recommendation ITU-R P.370.


* Radiocommunication Study Group 3 made editorial amendments to this Recommendation in 2000 in accordance with Resolution ITU-R 44.


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