Daption capense, with Procellaria aequinoctialis.
The black and white Cape petrel is also called the pintado petrel. The larger white-chinned petrel does not always have a white chin - this one did not.
Our pelagic trip was excellent for birdwatching (including 4 species of albatross), but disappointing for photography as the sea was quite chppy and the boat was small and I had to protect my new camera kit. I only managed a few photos in a calmer spell.
