For example, finger- spelling is used most frequently for nouns (e.g., “Toyota,” “pizza,” “studio”), but also may be used to express the meaning of certain adjectives (e.g., “busy,” “dark,” “tight”), prepositions (e.g., “to,” “on,” “about”), and a few verbs (e.g., “try,” “do,” “miss”).
It would most likely obtain information about the people on board and how the ship may of sank and also gather information about valuables and items that were left with the wreckage