lifeboat

(-bōt′)

noun

  1. a strong, seaworthy boat kept in readiness on the shore for use in rescuing people in danger of drowning
  2. one of the small boats carried by a ship for use if the ship must be abandoned

See lifeboat in American Heritage Dictionary 4

noun
  1. A boat carried on a ship for use if the ship has to be abandoned.
  2. A boat used for rescue service.

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