Possible Clues:

• Ins and outs, as advertised itinerary's held up
• Navigator's concerns
• Moon-driven phenomena
• They wait for nobody, not even the winning Oxford crew!
• Fisherman's concern
• Lunar ocean movements
• The water diet's in and out
• They wait for no man, including the Boat Race crews!
• Such mixed diets will come in and out
• Moon-driven ocean movements