Support Defence Post L38 is on the ridge overlook what is now the container terminal. This terminal was built over the old Beach Defence Posts of B, C3, C4 and C5.
This Defence Post is a Category B design with the observation tower offset to the East side of the two storey pillbox. The Lyon Light is mounted on the roof and faces South, rather than East.
Plans indicate that there was an underground defence position nearby, but this has not been located. This appears to have been a Position Finding Cell converted to a defence point.