The combination antenna is easy to mount and works very well.The quality of the reception is very similar to a regular VHF antenna. The difference is the height of the antenna in which the combination antenna is mounted normally. A typical mounting place of the combination antenna is the railing at the stern of the ship. This “mounting” height is much less than the height of the masttop. In our practical use we found out, that the transmission range and the reception range is more or less the half. With our easySPLIT OCB and the masttop antenna you have a typical range of app 8nm for the transmission of your AIS data and app 25nm for the reception of other AIS data (Depends of course of the antenna and cable quality, as well as of the weather!) This is simply due to the reason of the physical effect of the VHF (Distance is line of sight and you know, as higher, as better).
“There is not such a good amplifier existing than a high mounted antenna!”