This ship has been sitting off Sea Point for a couple of days.
It has an unusual structure and looks like a large building at night. I was curious so when I managed to see the name this morning I did some research.
A drillship is a bit like a very mobile oil rig. They are used for exploring deep sea oil fields because they can move around far faster than a normal oil rig.
Drillships use dynamic positioning systems to stay exactly stationary while drilling. Using a combination of GPS, wind and motion sensors and a sophisticated computer model the ship can stay absolutely stationary while drilling. Pretty cool stuff.