The Roman Map of Britain Coggabata Drumburgh or unknown fort on southern Burgh Marsh, Cumbria

Congavata (ND XL₄₈)
COGGABATA (Moorlands patera)

[My original interpretation as Longavada, which in light of the Moorlands patera discovery, I must partially abandon.
    For the river-name Long- see Maio Old Carlisle. The Latin vada 'fords' survived as a back-formation in the river-name Wampool poll' Waðoen ca. 1060. The amended Concavata has been assigned to Drumburgh for no better reason than Drumburgh's proper Roman name Mais was assigned to Bowness-on-Solway by Richmond - on questionable grounds.]

With the discovery of the Moorlands patera, Coggabata seems injected into the series along the Wall. But further investigation leaves the consideration of the Wall as a continuous fortification across Burgh Marsh in question. This leaves open the possibility of a fort on the southern shore, which would be Coggabata. I'm not being difficult, I'd just like to see it right.