Given a Peplink unit like a BR1 MKII, there are 2 x Cellular and 2 x WiFi antenna connections. Assuming the use of a single cellular and a single WiFi antenna, as high bandwidth is not an objective. For example a Poynting OMNI-292 and a Poynting OMNI-296.
Is there any minimum required separation, either horizontal or vertical between the two antennas? This is a boat, and the location I have in mind would have the two antennas side by side, about 6" on centre. There are no other VHF of radar antennas anywhere near.