Complex sentence: United States Navy sailors David Herdeg and Jim Parker are assigned to an experiment to render the destroyer escort USS "Eldridge" invisible to radar in Philadelphia harbor using equipment from a team led by Dr. James Longstreet.
Split into simpler sentences: United States Navy sailors David Herdeg and Jim Parker are assigned to the destroyer escort USS "Eldridge" during a project to make it invisible to radar. The ship is in Philadelphia harbor, filled with equipment from a team led by Dr. James Longstreet.