...Distribution of cottonmouths in Florida is statewide, including the Keys and other offshore islands... 
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...They are probably primarily an offshore species...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...Atlantic spinners may be abundant in offshore tropicalwaters as well...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...Records to datehave been limited to offshore tropical waters...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
..."Larsen, we'll standwell offshore till daylight," he said...
Various 「Astounding Stories, July, 1931」
...At six we came up with a steep rock, one mile from the main, and then hauled to the wind, offshore, for the night...
Matthew Flinders 「A Voyage to Terra Australis」
..., and obliged us to tack offshore...
Matthew Flinders 「A Voyage to Terra Australis」
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