I'm installing a GPS speedometer in addition to my chart plotter. I've been researching how to connect two devices to one antenna, but it seems to be an expensive proposition. Has anyone come up with another reliable solution? Here is one I found, but it's $350 and I don't know if it's too high tech a solution for the problem or even right. This one seems more for indoor applications versus marine environment also. https://www.gpsnetworking.com/products/aldcbs1x2 In the end putting a GPS antenna on either side of the boat isn't a big deal, but I'd rather have one if possible. Thanks.