They are located on a low cliff on the coast, north of the village of Crosscanonby, and just inland from the coastal road.

[1] The internal dimensions of the seaward gateway was 3 metres (9.8 ft) square, formed of four posts.

To the south-west of the road there were three buildings; all apparently built on sleeper walls and of similar size, but not of the same layout.

[2] Each milefortlet had two associated towers, similar in construction to the turrets built along Hadrian's Wall.

[4] The tower first appeared on an RAF aerial photograph in 1946, and was investigated by RL Bellhouse in 1962.

[4] The previous access point (from the small car park immediately below the milefortlet) was closed in 2009 or 2010.