Developers of navigation apps and hardware must place great care in creating an experience that doesn't unnecessarily distract the driver.

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It's hard to put a finger on our biggest complaint, but the fact that the navigation bar atop the browser isn't locked in place seems to be our largest frustration.

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Navigation will be restricted along the river while the work takes place, but access will continue.

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Because the place is so unforgiving, the luxury component comes not only in the comforting navigation of crackerjack guides and their surprisingly inventive campfire food, but in incredible discoveries.

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The smartGPS will be available in March (price TBA) with applications for both iOS and Android. (Note: these won't take the place of Magellan's existing apps.) Turn-by-turn navigation will be a premium feature -- an in-app upgrade.

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With a database of approximately 1 million landmarks worldwide, users can enjoy various functions, such as Landmark Navigator which displays the distance to a nearby landmark in the direction the camera is faced towards, and Photo Navigation which displays the distance from the photographer's present location to the place where a tagged photo was taken.

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As a seafaring nation, Britain depended on accurate navigation, and determining longitude on the open ocean depended on comparing local time to the time in a place where the longitude was known.

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