So, if I am understanding this correctly....

The POI's on Bluecharts aren't located within the maps like the Road maps?

I never realized it.... I guess the POI's do not change very often on the water liek they do on the roads, but I'm still surprised that updates aren't included with each new updated chart product.

Are they pushed to the unit(s) if you do a software/firmware update ?

Any idea how often they are updated ?