Following is a post I put up on another board --
"In reality most of the charts we use are less accurate than GPS is capable of.
My main reason for the post is that far "too many of us" tend to trust our electronics
more than using visual confirmation, radar
, etc to insure that we are comfortable that we "know' where the boat is and what is a safe direction to procede.
I always use multiple inputs to validate where I am espcially if there are any 'hard' things to hit on the bottom like rocks, reefs
, jettys etc..
It also goes to show that the latest technology does have it's cautions when using."
For me paper charts with visual reference is always the final check on any navigation
. If something does not look or feel right I triple check myself until it does.
I have also found the newest charts from Softchart which combine vector and raster and run on the latest version of the Captn look really good and map to the explorer charts pretty well on first comparison.