CHELSEA (CBS) – The Nantucket Lightship is undergoing a major restoration.

The 50-foot lighthouse and museum has been moved from East Boston to the Fitzgerald Shipyard in Chelsea.

Crews will replace the 84-year-old steel frames and complete other maintenance work so that visitors can once again enjoy it.

“We have many groups that come to the ship,” volunteer Tim McCarthy said. “It’s a big learning experience for all.”

Restoration is expected to cost over $1 million and take up to three months to complete.