Possible Clues:

• Navigate this way to the Day of Judgement
• Estimate based on little or no information (2 words)
• Guesswork (2 words)
• The way to find your way to get to Judgment Day
• Is that the way to get to the Day of Judgement?
• Way to find your way to Judgement Day?
• Estimating sea position blind
• Old navigational work
• The way to find your way to the Day of Judgement? (4, 9)
• Estimation of position at sea by reference to course steered and distance run