Hi I have a 898c si unit that came on my boat when I bought it. It has a navionics micro sd card in it with the adapter. I’m looking at buying a helix 7 chirp si gps. Will the card from my 898 work in the helix 7? A guy I talked to at bass pro told me that the new navionics cards have all of the USA on them. I told him that I thought my card was for the southeast US and he told me that was a very old card and they changed to one with all of the US on it. He recommended that I buy the helix 7 chirp si gps w/nav so it comes with a new card but its more money. I would like to try to keep my cost down if my card from my 898 will work and I could buy the helix 7 without the nav card with it. Just trying to find out if I can do this. Thanks