Complex sentence: The first incumbent was Garnet E. Shaw, having been in 1912 the first Anglican chaplain appointed to the Australian Navy, resigning because he objected to compulsory attendance at divine service for naval personnel, which was at odds with Navy policy at that time.
Split into simpler sentences: The first incumbent was Garnet E. Shaw, having been in 1912 the first Anglican chaplain appointed to the Australian Navy. He resigned from the Navy because he objected to compulsory attendance at divine service for naval personnel, which was at odds with Navy policy at that time.