The island is clearly visible at that range unless cloud/fog and the sea is a positive soup of albatrosses, penguins, etc at the permitted closest approach, but near zero chance of the sheathbill etc. There was, and is, no discussion of landing on the island - what they are hoping is permission to go closer than the 12 nm exclusion limit. This was not granted last time, but the trip was still excellent.
This year's boat is Durban - Durban, rather than out of Cape Town, which means the birding on route out is likely to be far less good. And for foreign visitors, it is much more expensive than last time.