From a consumer standpoint, we definitely have reached a tipping point in the area of vehicle navigation.

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Mr Clark, who has been flying planes for 50 years, the area had "important navigation features" such as the motorway and the River Severn.

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The Army Corps of Engineers also has being dredging in the area to deepen the channel and help navigation.

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The 10-inch tablet UI has also received a slight tweak, moving closer to the design for phones and the Nexus 7, with centered navigation buttons and the notification area up top.

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With permission from air-traffic controllers who are monitoring any other aircraft in the area, it's not dangerous for pilots to divert from prescribed navigation paths.

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This included a weekend in a remote area of North Carolina when my cell signal was roaming and several car rides when I used BlackBerry Maps for navigation.

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