Union leaders are urging workers at the Northrop Grumman Corp. shipyard in Pascagoula, Miss. to end a month-long walkout by approving the company’s latest contract proposal, which will be voted on today.

Under the proposal, workers at Northrop’s Ingalls shipyard located in Pascagoula, Miss. and also the state’s largest private employer — would get a raise of $2.78 an hour over the next three years which is $1.22 less than what workers originally sought, but 18 cents more than the company’s previous proposal, union officials said.

“We believe this agreement addresses the entire range of concerns from the members and their families and we’re recommending a yes vote,” Ron Ault, national president of AFL-CIO’s Metal Trades Department, said in a statement Tuesday.

Workers went on strike March 8 after rejecting two previous offers from Northrop. Employees at Northrop shipyards in Gulfport, Avondale and in Tallulah, La. approved labor contracts earlier this year. The month-long Pascagoula strike is the longest work stoppage at the plant in more than seven years, Northrop said.

The Los Angeles-based contractor is the nation’s largest shipbuilder and gets 18 percent of its $30 billion annual revenue from shipbuilding.

Northrop shares were down 20 cents to $75.49 in afternoon trading Wednesday on the New York Stock Exchange.