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This propagation model is fully described in Recommendation ITU-R P.1546-5. Only the land terrain profiles are implemented in SEAMCAT. The ranges of application are the same as for the ITU-R P.1546-4, except for the Tx-Rx horizontal distances that can be smaller than 1 km. In the section about Algorithm description, only the parts of Recommendation ITU-R P.1546-5 that are different from Recommendation ITU-R P.1546-4 are listed.

It must be emphasised that the measurements and modelling in this Recommendation intrinsically include the effect of terminal clutter, so it would be inappropriate to add a calculation of clutter separately.

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