Before the boat had even got underway a bat (vannflaggermus in Norwegian not sure of the english name) was flying up and down the quayside looking a bit like a Crag Martin (I wish!).
No great rarities on the 3 hour trip but a Little Auk was a year tick and 3 Razorbills were the first I've seen in the Oslofjord this autumn alongside around 20 Guillemots. Common Scoters were numerous with around 70 all of which were in female/immature plumage whilst the 9 Velvet Scoters seen were all adult males - sounds like something to be investigated using satellite tracking!
Otherwise 2 Purple Sandpipers on a little rock in the middle of the fjord alongside a seal bobbing in the water. We also had a seal hauled out on a rock on a larger island which gave great views.