To ignite conversations about protecting the ocean, Sam is building a raft with debris — and wants to sail it to Sydney

Sam McLennan is making his raft from marine debris found on the shore.  (ABC News: Luke Bowden)

It's January 26. Sam McLennan arrives unannounced at the door of long-time Tasman Peninsula resident Barry Hinton and knocks, there to ask for help on an ambitious project. 

"He kind of shocked me a bit cause I was in the bath and I thought he was the meter reader," Barry recalls, laughing.