Possible Clues:

• In seas unkind, as were the 10 and 17 — by 15 and 19 down
• 'You ___ my battleship!'
• Shipwrecked
• Doomed — bored
• At the bottom of the ocean?
• Descended from Louis XIV but not in forefront of government
• Gone to Davy Jones' locker
• (Has) disappeared beneath the waves
• Sent to bed after daily smack on bottom
• Having been submerged