aj's usually has em in stock right behind the counter.
navionics has different levels of map chips though so i'd go on their site and look at the differences. you may not need all the satellite image stuff etc. so you may be able to get something less expensive. as for the hds, it'll have no problem using the navionics chip. you just need to go into the menu on the unit and tell it to use the chip maps instead of the pre-loaded stuff from the factory. easy to do.
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