Rock Armour – Large boulders dumped on the beach as part of the coastal defences

To remember the meaning of the term Rock Armour, use the following mnemonic:

The rock and her armour were what the coast needed to protect itself.

Rock armour is a barrier formed by large boulders that prevents erosion of coastal features such as beaches and cliffs.

Rock armour, also known as riprap, provides protection against serious erosion by absorbing wave energy.

Although regarded as one of the less expensive options, it can still be quite costly to obtain and transport the boulders.