[iPhone God App] It was found using the Memory-Map | GPS Navigation with offline topo maps and marine charts actually

Turn your iPhone or iPad into an outdoor or marine GPS. Maps are stored on the device for offline use, when you don't have any network connection. The GPS will show your location even where you have no mobile phone signal.

Although the app can be used standalone, the maps and overlay data may also be used on your home computer for planning, and for printing maps on paper. Then upload everything to your phone and enjoy navigating outdoors with high quality maps.

When you get home you can transfer your tracklog and points of interest back onto your computer, to see where you actually went, analyze your speed and elevation profile, and so on.

Features:
+ Fast scrolling and zooming
+ Import and export GPX files
+ Auto-rotate screen, or lock in your preferred orientation.
+ Screen lock to prevent accidental screen touches while recording a track
+ Shows speed and direction of travel, even while walking slowly
+ Support for GPS and Compass sensors, where available.
+ Placename index
+ Moving map, lock GPS position and automatically scroll the map
+ Records tracklogs.
+ Create and edit marks, which may be linked to a web URL
+ Plan routes, measure distance and bearings.
+ Shows Altitude
+ Lat/Long, UTM and British National Grid coordinate systems
+ Email position marks or tracklogs as GPX files
+ Load maps from Memory-Map PC navigation software

Battery Use Disclaimer: "Continued use of GPS running in the background can dramatically decrease battery life."