Statistics for occurrence #1 of “Ship Island” in page 218 of Admiral David D. Porter, The Naval History of the Civil War.:

...n. Acting-Master Charles Jack came out in this vessel from New York; he lost his mainmast in a gale off Cape Hatteras. but persevered until he arrived at Key West. and sailed with the flotilla to Ship Island
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Ship Island (Mississippi, United States) 953 16 73 0 0 user votes
Ship Island (Alaska, United States) 0 0 0 0 0 user votes
Ship Island (Alaska, United States) 0 0 0 0 0 user votes
Ship Island (Idaho, United States) 0 0 0 0 0 user votes
Ship Island (Maine, United States) 0 0 0 0 0 user votes
Ship Island (Maine, United States) 0 0 0 0 0 user votes
Ship Island (Maine, United States) 0 0 0 0 0 user votes
† Ship Island (Mississippi, United States) 0 0 0 0 0 user votes
Ship Island (New Hampshire, United States) 0 0 0 0 0 user votes
Ship Island (New York, United States) 0 0 0 0 0 user votes
Ship Island (Ohio, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.