He wanted her to be an adviser on aircraft design and navigation.

VOA: special.2010.05.26

In the navy,he learned all about navigation,mathematics, mechanics,communications and electronics engineering.

VOA: special.2010.05.30

So he helped with Mercury's communications and navigation systems.

VOA: special.2009.06.10

"And Quentin,with his unorthodox methods of navigation, this fearless explorer took this ship across and brought it in with flying colors, and that's why I'm here."

VOA: standard.2010.03.08

He says the boat apparently experienced technical problems with is satellite navigation system.

VOA: standard.2009.07.30

Independent Russian military analyst Viktor Litovkin says Russia lacks combat support systems rather than firing units, and notes that such systems consist of drones, precision weapons,reconnaissance,navigation, communication,and guidance systems,etc.

VOA: standard.2009.03.20