Possible Clues:

• Where many boats head
• Conclusion of Canada's motto, in english
• Where navies go
• "They went __ in a Sieve, they did": Lear
• Oceanward
• Captain's command
• Words repeated after 'I shall no more,' in 'The Tempest'
• Where cruise ships go
• Out (sailing)
• Where the owl and the pussycat went, in poetry