Possible Clues:

• It'll point you in the right direction
• Fellow politicians going round boundaries of Atlas range
• Range of device that draws circles
• Shortly arrive at the start of a way across range
• Having faulty maps in island, use this to navigate
• Commander marks defile in mountain range
• Hiker's tool
• Comet's gas cloud? Not quite, to go by this instrument
• News reader?
• Nearly reach canyon's limit