Hi Joy
I have not logged in here for some time so this is a late reply. Hope it may still be useful. The navman unit I replaced was a multi 3100 and the advansea was a straight swap with the same old transducers. No problems so far.

When the unit arrived (air freight), we had been cut off from the wider world by flooding for some days. So with the cupboard bare, supermarket empty and house guests trapped in town we could still get our marine electronics. Definitely can’t complain about the service.

Next time I will see if they deliver pizza as well.

Regards Dave.

Hi,
I saw your post here about replacing navman with advansea. I have the same problem with display led going bad. I wanted to know how the advansea is working for you now. I have a Navman Multi 3100. Did you replace a multi unit? Any suggestions would be great! Thanks, Joy