Originally Posted by CPseudonym
Navionics on my iPhone 5 and iPad mini are my paper substitutes.
Navionics has pretty maps, but watch out for their current tables. They were seriously off, as in 8 knots off, at Sechelt Narrows (aka Skookumchuck Rapids) when I was going through back in December. Ports and Passes hardcopy and OpenCPN on my PC were both correct, so Navionics got outvoted in my planning, which was a very good thing in this case.