Continuing with Chamelion's post some time ago.....
We have the latest Navionics charts in a new B&G plotter and for the Yasawa Islands they are worse than useless and in fact downright dangerous. When compared to paper charts, C-Map, satellite maps, Navionics shows reefs that don't exist, doesn't show reefs that are there, doesn't show the channel into the Blue Lagoon from the SE etc etc.
We have seen cruisers here who only have Navionics on ipads, nothing else. That is stupid and dangerous.