Despite numerous researches on the propagation loss modeling at HF, VHF and UHF, most of the existing models in the
forested channels are theoretically and empirically based; they are based on the experiment carried out in the laboratories using
dissipative slab materials and water in bottles as representations of ground and trees in the forest environments or a periodic
dielectric rod array and an array of water-filled straws in the Laboratory as a simplified, scaled model of a typical forest [2] –
[8]. They are not based on physical measurements in the real physical forest environments. Consequently, the models may not
have high prediction accuracy, and need to be re-investigated. Also, to the best of our knowledge based on available
information in the open literatures, there are no reported VHF radio wave propagation loss models available for very long depth
forested channels [2] – [8].