Turret 1B was probably located just west of the junction of the A187 Fossway, and Roman Avenue. This location was suggested by FG Simpson, and is based on measurements from Milecastle 2 (the location of which is also in doubt). No evidence of the turret has been identified.[10]
Location on Ordnance Survey 1:25 000 map: 54.981069°N 1.563253°W