Police are currently searching areas around Primrose Sands and Carlton Bluff in relation to missing 77-year-old Bob Lucas.
The Westpac Rescue Helicopter is being utilised in the search.
Bob was last seen just before midday on Tuesday, 7 July on Tamarix Road, Primrose Sands wearing a light bone-coloured hooded jacket.
He is about 172cm tall with a slim build and is believed to be travelling on foot.
Anyone who has seen Bob recently, or who has information about his whereabouts is asked to contact Sorell Police on 131 444.