Why flying boats could not simply land and refuel beside Atlantic convoys

Did navies consider having flying boats land with convoys and refuel at sea to cover the mid-Atlantic air gap?

They considered related ideas, but range, launch and recovery, refueling, maintenance, and the need for sufficiently calm water made routine convoy-side operation impractical.

A flying boat could cover ocean areas from distant bases, but landing beside a convoy exposed it to sea conditions that the escort commander could not control. The aircraft then needed fuel, servicing, and a safe method of returning to flight while the convoy continued moving. Shorter-ranged types such as the Walrus also required a shipboard launch and recovery system that consumed time and equipment. The panel concludes that the idea was examined but could not provide dependable coverage across ordinary North Atlantic weather.