Not sure about Hummingbird units, but Lowrance units I am familiar with, the external antenna works better, stays connected better, more stable.

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Not sure about Hummingbird units, but Lowrance units I am familiar with, the external antenna works better, stays connected better, more stable.
i have one of each and they both work good my 1197si is external and it works great, now the 787ci is internal thats in the dash and it takes a few seconds longer for the gps to kick on for it to get a reading but it still works great. but i think its becouse its in dash if it was exposed it would proubly pick up faster but it still dont take that long for it to pick up.
I will point out one problemwith GPS. If the receiver goes out on an external you can just buy a new antenna. If you have one go out in an internal i would guess that you would have to send it in for repair. Just throwing that out there because i recently had an antenna quit working on my lowrance.
Tom
