The phrase "act as a captain" is correct and usable in written English.
You can use it when describing someone taking on the responsibilities or role of a captain, whether in a literal or metaphorical sense.
Example: "During the absence of the team leader, she had to act as a captain and guide the group through the project."
Alternatives: "serve as a captain" or "take on the role of captain."
Young, who had served as Acting Superintendent as a Captain in 1897 recognized the dysfunctional and complicated relationships between the War Department, Corps of Engineers and Interior Department which Congress knew was adversely impacting the successful administration of the park.
One player on each team acts as captain.
When I received an invitation to act as blog captain for the month of March, my first inclination was to decline.
"Automation would mean that any qualified member of staff could act as train captain, diminishing the disruption caused by strikes," it said.
Can finally take my girlfriend to a di Caprio film @RevenantMovie 12 #OscarNoms #TheRevenant pic.twitter.com/mCqYXvuiMk Even United's old guard got in on the act as former captain Bryan Robson and one-time record signing Andrew Cole Tweeted their eagerness to see the picture, fuelling suspicion even further that something was afoot.
She takes the armband from fellow defender Corinne Yorston, 31, who will now act as club captain.
While on the station he had occasion to act as Flag Captain to the Commander-in-Chief on the station, pay calls on cities as diverse as Halifax, Nova Scotia, Quebec City and Boston while cruising the Eastern Seaboard of North America.
Another former England captain, Michael Atherton, added that his death could act as a wake-up call for the sport.
Another debutant from the Caribbean, Praveen Kumar, is included as part of the seam attack, while Wriddhiman Saha edges Parthiv Patel for the right to act as captain Mahendra Singh Dhoni's wicketkeeping understudy.
