Complex sentence: She had trouble communicating the information to Callaghan because of his inexperience operating the ships as a cohesive naval unit, and there were additional problems with their radio equipment and a further lack of discipline regarding their communications procedures.
Split into simpler sentences: She had trouble communicating the information to Callaghan because of his inexperience operating the ships as a cohesive naval unit. Add problems with their radio equipment and a further lack of discipline regarding their communications procedures.