Maj. Paul Doucette, spokesman for the Joint Rescue Co-ordination Centre, says the search will continue into the night. ((CBC))

Searchers in Nova Scotia are looking for a missing scallop-fishing vessel in the Bay of Fundy.

Officials with the Joint Rescue Co-ordination Centre in Halifax said the vessel — called RLJ — left Digby with four people aboard.

Maj. Paul Doucette said three Canadian Coast Guard vessels are searching the waters, along with a Hercules aircraft with night vision capabilities.

"The weather conditions are very good," he told CBC News on Monday night. "At this point we just remain hopeful that we'll have a positive outcome."

Digby RCMP said the four men on board the 13-metre-long RLJ left port last Tuesday for several days of fishing.

One of the crew members called a family member on Friday to say the boat would be back in port on Saturday, according to Digby RCMP officers. That's the last time the crew members are known to have made contact.

Family members concerned

Digby RCMP said family members became concerned when the RLJ still didn't come home on Sunday, because the vessel only had enough fuel to last until Sunday. The weather appeared to be favourable over the weekend.

A cooler was found floating in the Bay of Fundy on Monday, midway between Digby and Saint John, N.B., Doucette said.

"As far as finding the cooler, it was something that was found and at this point we can't make any link, whether it was just a cooler that was out there or something that came from the vessel," he said.

The Joint Rescue Co-ordination Centre launched the search on Monday morning. A Hercules aircraft from CFB Greenwood, a Sea King helicopter from Shearwater, and a Transport Canada plane scoured the area along with three coast guard vessels.

They are searching the Bay of Fundy from Saint John, northeast to the neck of Chignecto Bay.

The search is expected to continue into Tuesday morning before another assessment is made on how to carry on.