US Navy

Operations Specialists (OS) function as Plotters, Radiotelephone, and Command and Control internal communications talkers; maintain Combat Information Center (CIC) displays of strategic and tactical information; operate surveillance radars, Identification Friend or Foe (IFF) Systems, and associated equipment; interpret radar presentations, evaluate tactical situations, and make recommendations to superiors during watch conditions; apply current doctrine andprocedures to CIC operations as specified by U. S. Navy Instructions and Joint/Allied/U. S. Navy publications; and apply current doctrine and procedures to radar navigation; provide technical information and assistance during Surface Warfare, Air Warfare, Submarine Warfare, Amphibious Warfare, Mine Warfare, Naval Surface Fire Support, and Search and Rescue operations; provide technical information and advice on capabilities, limitations, reliability, and operational readiness.

Quartermasters (QM) stand watch as assistants to officers of the deck and to the navigator; serve as steersmen and perform ship control, navigation, and bridge watch duties; procure, correct, use, and stow navigational and  oceanographic publications and charts; maintain navigational instruments and keep correct navigational time; render "honors and ceremonies" in accordance with national observance and foreign customs; and serve as petty officers in charge of tugs, self propelled barges, and other yard and district craft.