This photo, one of many in a collection of photos from the service of a crewman on SC 254, shows SC 178 fueling -- and is so jarring that I had to post it.
Among the difficulties in the task of moving the chasers overseas for duties in Europe and the Mediterranean was the problem of taking on fuel along the way. After various experiments, the standard method adopted was for the chasers to run alongside the fuel ship, matching its speed. The chaser would then be tied off to the ship, and a hose passed across.
As you can see in this photo, it was something of a trick to manage the chaser under these conditions, to keep away from the ship but not over-steer and tip the boat.