on board

Originally a literal reference to the wooden boards of the deck of a boat or ship.

• "Is that new teammate properly on board yet?"
• "It's a good idea, but let's see if we can get a few more of the management team on board."
• "Without management on board, the project has little chance of success."
• "The ships' successes made Hitler quite the fan of them, and he supported the idea of more being converted and sent out soon. And so, with the Führer on board, albeit not literally, another six vessels were rapidly placed under conversion."
• "Soccer players certainly tend not to take fluids on board."

• off board

• tread the boards