Martin Seymour Hellewell, 86, of Jamestown, R.I., passed peacefully Jan. 17, 2023. Martin, fondly known as Mart, or Marty to his U.S. Navy peers, was born Dec. 20, 1936, in Philadelphia to Jack and Gladys S. Hellewell and grew up in Saunderstown, R.I. After serving active duty in the Navy, where he was stationed