The fact that the outdoor version is directional kind of limits its adoption in mobile usage, doesn't it? Most similar products have omnidirectional antenna. Can't imagine you would rotate it by hand on a boat towards the land while on passage
I think it’s going to be targeting mostly stationary HA redundant uplinks. Backup for primary uplink or low usage primary link. In those scenarios pointing at your nearest antenna fixed is much better than an omnidirectional antenna.
The spec sheet mentions 6 antennas and implies only 2 are directional:
(6) Embedded cellular antennas, including (2) high-gain for downlink: peak 9 dBi, 85°x85°
Typically these modems are 4x4 mimo so it must have some method for switching the 2 directional with 2 of the omnis in it based on which ones is needed.
https://techspecs.ui.com/unifi/integrations/u5g-max-outdoor?...
This product targets businesses where they will mount it in a fixed position and target a specific tower so they get the best throughput.