It’s no coincidence that the first strike in twenty years at Bath Iron Works (BIW) began months into the COVID-19 pandemic. While Maine has one of the lowest COVID transmission rates in the country, the spread of the deadly virus helped spark the strike that has largely shut down the shipyard at BIW — one of Maine’s largest employers.

In June, when around 4,300 Machinists Local S6 union members at BIW voted overwhelmingly to strike, many had already soured on management over its handling of the pandemic.

The walkout — which represents the largest private-sector strike of the year — has lasted for nearly seven weeks. But late last week, both sides saw a breakthrough as a tentative agreement was reached that appears to hand the union a victory on its demands.

BIW, a General Dynamics subsidiary that builds battleships for the US Navy, never shut down the production facility because it was deemed an “essential business” by the US government. After a BIW worker tested positive for the virus in late March, the company encouraged employ­ees not to report to work. Many did stay home for weeks — but they had to use paid vacation or sick time or work unpaid. Union leaders called for a shutdown with pay while also pushing state lawmakers to pressure the Navy to allow the shipyard to close.

“They said we’re essential workers because we build battleships, but how essential are you if you get sick? It’s scary for a lot of people,” said John Louis Cabral III, a shipyard worker and Local S6 member.

Cabral, 34, couldn’t afford to stay home long: he was hired last year and had little accrued paid time off. With three kids to support and no access to pandemic-related unemployment benefits since he wasn’t furloughed, he went back to the yard.

With employee attendance way below normal for weeks, BIW fell further behind on production of Navy guided-missile destroyers. As part of negotiations with Local S6 for a new three-year contract, the company proposed changes allowing it to hire nonunion subcontractors more quickly. That and other proposed changes to seniority and work rules in the company’s “last, best, and final offer” on June 13 did not go over well with Local S6.

“It’s a power struggle in the yard right now, and that’s facts,” said Cabral, who helps manage inventory at the shipyard.

On June 22, 87 perccent of Local S6 members voted in favor of striking, even though they’d lose company-paid health insurance during a pandemic. Federal mediators were brought in to restart negotiations in July, around the same time BIW laid off members of another union local and brought in subcontractors from out of state to avoid falling further behind on production.

“We’re all standing as one because we don’t want subcontracting in here,” Chad Bamford, a twenty-five-year-old crane rigger who’s worked at BIW since 2017, said on the picket line Friday. “They’re trying to subcontract out our work. We don’t want outsiders. Give us more overtime. We build the best ships in the world.”

The company has said it never wanted to permanently outsource work away from the union through subcontractors. “We seek only efficient access to all available resources to improve our ability to deliver to the US Navy on time,” BIW president Dirk Lesko wrote in June. The shipyard was six months behind schedule at the start of the strike.

Both Bamford and Cabral blame production delays on both the pandemic and mismanagement. A BIW spokesperson did not respond to a request for comment.