Quantum to Axiom via WiFi - intermittent

[Ken19]

I have just installed an Axiom 9" MFD (s/w v 3.1.96) at my Nav station in a GRP sail boat and a Quantum Radome low down on my mast, 4.8 meters straight line between them. Using WiFi, they are "paired" but the radar display is intermittent, i.e. the scan may run for a few cycles then the sweep stops momentarily and restarts further round the cycle. After a short time the scan stops and the "OFF/Not connected" screen appears on the display. Sometimes it will re-connect, other times is does not find the radar. The boat is out of the water, in a boat yard, with a number of other WiFi systems operating within range. The Axiom appears to use WiFi Ch1 and the boat yard powerful WiFi is on an adjacent Channel. Is there a problem with Axioms/Quantum and WiFi interference?