USNHC photo. Not direct overhead, but bridge level looking forward.
My photo interpretation skills say a centerline capstan with anchor chains laid out P&S towards the hawse holes.
You need to get to the archives in DC/College Park. The list of holdings at NARA for the Carronade include plans. Unfortunately they have not been digitized for online access.
Another similar shot out of brown water navy at Cam Ranh Bay
