I have a Garmin GPSMAP 225 on my boat. I have a spare antenna for it in my
basement.

I also have a Micrologic ML250 GPS on the upper helm station of my boat.
Recently, the ML250 stopped acquiring the satellites. I suspect a problem
with the antenna or the cable. Since I have this spare antenna for my
Garmin, is there any harm in using it for the Micrologic unit? It uses the
same BNC connectors, but are most GPS antennas created equally?