The title refers to the number of dolos which are used to produce the harbour outside of Torness Power Station.
They work by dissipating, rather than blocking, the energy of waves. Their design presents very little surface area to the wave action, making them difficult to dislodge, unlike rectangular blocks that can be swept away by heavy seas. Though they are placed into position on top of each other by cranes, over time, they tend to get further entangled as the waves shift them about. Their design ensures that they form an interlocking, but porous, wall.
They are often numbered on the outside so that satellites can periodically track their movement. This helps engineers gauge whether they need to add more dolosse to the pile.
Taken with my Canon 5D/24-70 mm lens at 27 mm. 4 min exposure at f11 using a 10 stop ND and 2 stop grad.