The area around this signpost is littered with dolosse - big concrete blocks used to break the force of the waves hitting the retaining wall of the V&A Waterfront's parking area.
Even if you were a strong swimmer accustomed to braving the icy water, and even if the ocean looked particularly calm, the small waves ebbing and flowing would quickly crash you against the barnacle-covered concrete dolosse, making your swim at best rather unpleasant, and at worst, fatal.
It's strange how apparently calm waters can actually be very rough seas for humans, when combined with immovable objects like these dolosse. This sort of "apparent safety" is presumably also the reason that I see parents driving with their young kids unrestrained in their cars. If you do on occasion allow your kids unrestrained in a vehicle, imagine for a moment running as fast as you can into a sheet of glass. It takes a lot to make me angry - but this does.
If you're a parent, take a moment to visit the Childsafe website and read the Arrive Alive article on ensuring that your children are kept safe while in transit.
Thank-you to Mandy for helping out with photos, including this one, while we've been touring around the country for the Confederations Cup.