This time I've attached some shots of a skua that came up our slick just after reaching the shelf (so, the images were taken around 10:30am for lighting info). The bird is quite pale generally but especially so in the lores and with a pale nuchal collar. It is an interesting bird as the structure does seem to fit more a Brown than a South Polar, but those underwing coverts are very dark and the white flashes quite bold showing good contrast.
Again, any comments welcomed...these birds are difficult (and thanks to Nikolas, Jeff and Lindsay's comments thus far, which I will share if we get some interest in this bird). Unfortunately I can't seem to find a dorsal shot from anyone who was on board...yet!