USS Kittiwake Wreck and Reef Snorkel Adventures. If you like snorkeling, diving and cruise ship shore excursions, read this article. If you plan to visit Grand Cayman Island by cruise ship this shore excursion is really great. This article also has some great underwater images of the retired USS Kittiwake which now sits on the ocean bottom as an underwater reef. If you like this article please share it and "Like" it.