Related Clues:

• On a Navy mission
• Making a crossing
• Way off shore
• Sailing or whaling
• On the open water
• Not grounded, perhaps
• On the bounding main
• Completely puzzled
• On an ark
• '... arms against -- of troubles'
• 'Into -- of dew'
• Like the Owl and the Pussy-cat
• Experiencing swelling, maybe
• Where liners go
• Like many a hurricane