[TG] [TG11] Can I use GA150 GPS antenna with AIS700?

[NomadAU]

Hi

I have 2 questions, but first a bit of context setting.
I purchased a GA150 GPS antenna along with lots of other Raymarine gear including an Axiom 12. Only then did I discover that the GA150 is not compatible with the Axiom 12 - apparently it only works with the Axiom 12 Pro.

Since I had already fitted the GA150 antenna to my davits and routed the cable through the length of the boat, I thought I would use it with the AIS700. I then hit another problem - it doesn't seem to work with the AIS 700 - I get an alert on my MFD saying the AIS has no position sensor fitted...or something like that. When I plug in the GPS antenna that came with the AIS, it works ok, however, it is just sitting loosely on the dashboard and is not permanently mounted.

So, my 2 questions are the following

1 - is the GA150 compatible with the AIS 700 as an external GPS antenna? They both seem to be passive GPS antennas, so why wouldn't they be interchangeable.

2 - If the answer is yes, the GA150 should work with the AIS700, then I suspect I have a broken GA150. What I have done is put a continuity meter across the external sheath and internal core and notice a difference between the 2 GPS antennas.
The one that came with the AIS reads approx 5Ohm, while the GA150 briefly reads something other than open circuit, but then quickly reads open circuit.
Is this normal, or is the unit defective?

Ideally, I'd like to use the GPS antenna mounted externally on my davits - its in a clear area and won't roll too much, so appreciate feedback on what might be happening here.

Cheers,
Mike