Knocke cache is named after the knockes (jetties or groynes) that were built out to the sea in order to break the force of the waves. Sections of the wall were named after the knockes - Nerve Knocke, Spittleman Knocke, Gap Knocke, Beacons Knocke, Church Knocke, Watch House Knocke and High Knocke. The name High Knocke lives on as the name of the road opposite.