Possible Clues:

• Approach of country at end of voyage
• Dry ground sighted from a ship
• Avalanche made by returning crew
• Touchdown for New York in autumn is part of the journey one gets from Sky
• Avalanche that's seen at end of voyage?
• Approaching the end of the journey, what the crew are expecting to see from earthmover perhaps?
• End of a sea journey
• Voyage's end
• Got ground down, as one may see from the sea