Humminbird 587ci

[ZILLA(walleye killa)]

I just purchased the fishfinder/gps combo I was wondering if the pre installed unimap is is a good program or should up grade. I fish the western basin thanks

[rsfrail]

after alot of reading, back and forth I'm ready to order this unit. It is difficult to determine because everybook, sales person, and forein techie at Hummingbird says something different. Could you confirm to me on the back of your unit there is a 4th plug in port for an extra/external GR-50 gps puck.
Thanks Ron

[ZILLA(walleye killa)]

Yes my unit has for plugs on the back side I am not sure if it takes your kind of gps antenna but does say you can add a external one

[rsfrail]

thanks for the update, I'm gonna plan to add the new gps unit. The one for the 4th port. Hopefully I w'ont need to though if the built in sensor works. The ads never say you can add an extra/external pick-up unit if you need one.
Thanks for your quick responce - Ron (rsfrail) walleye.com
warming up- get ready.....................

[ZILLA(walleye killa)]

Yea no problem I can wait to get out there and fish if you hear when the ice is gone and boats are heading out let me no please good luck this year if you are around the western basin you may hear us on the radio we are ZILLA. Have a good spring