"Crew trapped on Baltimore ship, seven weeks after bridge collapse,"

As a controlled explosion rocked the Dali on Monday, nearly two dozen sailors remained on board, below deck in the massive ship's hull...

The crew, made up of 20 Indians and a Sri Lankan national, has been unable to disembark because of visa restrictions, a lack of required shore passes and parallel ongoing investigations by the National Transportation Safety Board (NTSB) and FBI.

On Monday, the crew remained on board even as authorities used small explosive charges to deliberately "cut" an expanse of the bridge lying on the ship's bow...

While the ship is likely to be re-floated this week, it remains unclear when it will be able to make the 2 nautical mile (3.7km) journey to port...

According to Mr Messick [executive director of the Baltimore International Seafarers' Center] , the crew has been left largely without communication with the outside world for "a couple of weeks" after their mobile phones were confiscated by the FBI as part of the investigation...

"They can't do any online banking. They can't pay their bills at home. They don't have any of their data or anyone's contact information, so they're really isolated right now," Mr Messick said. "They just can't reach out to the folks they need to, or even look at pictures of their children before they go to sleep. It's really a sad situation."

The plight of the sailors also attracted the attention of the two unions representing them, the Singapore Maritime Officers' Union and the Singapore Organisation of Seamen.

In a joint statement on 11 May, the unions said that "morale has understandably dipped", driven by "unfounded fear of personal criminal liability" and emotional distress...

For the time being, the crew has been given SIM cards and temporary mobile phones without data included, according to Mr Messick...

Synergy Marine, the Dali's Singapore-based management company, did not respond to several queries from the BBC...