Possible Clues:

• Seconds taken to lower boat
• Maybe lighter broadcast about to be introduced
• That's for the South to make one of 10 across lighter
• Small beast in boat
• Trash holder
• Harbor craft
• Expression that's sullen, almost? Lighter
• Floating garbage-carrier
• It's beastly towards the stern of the vessel
• Boat going between The Needles and Cowes?