Does not sound like Dock Master forced him out:
Debate rages about Bounty captain's decision to set sail | The Chronicle Herald
“He said he wanted to get to the southeast quadrant and ride the storm out,” said New London Dockmaster Barbara Neff. No one raised objections.
Also from article:
"Walbridge’s friends and former crew members described him as a skilled captain who had a good plan that didn’t work because of mechanical problems. The ship lost power, which meant it had no propulsion and could not pump out water, according to the vessel’s website. The surviving crew members have not publicly detailed what happened."