dansk wrote in
ups.com:

On Jul 9, 9:49 am, Geoff Schultz wrote:
I will be pulling my mast and am planning on adding a second VHF
antenna for a dedicated AIS receiver and eventually an AIS
transponder. However, I'll end up with both of my VHF antennas next
to one another. I suspect that this isn't a good idea. Any
suggestions as to how to handle this?

-- Geoff

Mount them vertically, e.g. collinear. Perhaps one on the spreader.

Bob

I don't have spreaders as I have a carbon fiber mast.

-- Geoff