Free images results:
 

Masts pictures, stock photos and images

 
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Boats Stock Image
Author: Rbouwman
Ships Mast Royalty Free Stock Photography
Author: Nickr
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Masts Stock Photography
Author: Andykazie
Masts Royalty Free Stock Image
Author: Djay712