My OS daughter is in Alameda on the Boutwell. She works in Radio....think there are maybe six or seven OS's there and the rest work in Combat. I found a great explanation of what she does from a Boutwell newsletter that was sent out on a previous patrol. I know it's not the same as getting first hand info from somebody but this states it alot better than I ever could.
The Communications Division is responsible for maintaining
communications between Boutwell and “the
rest of the world”, including other armed services, federal
agencies and various civilian organizations. Each person is responsible
for a multitude of tasks that need to be accomplished
throughout the day. Some of these tasks include
standing the Radio watch, which is maintained 24
hours a day, 7 days a week while the ship is away from
homeport. A radio watchstander has the responsibility
of monitoring various circuits, satellites, and frequencies
which keep Boutwell ready to handle any mission
at any point in time. Other duties include transmitting
and receiving all of the ships classified and unclassified
messages, sending and receiving all of the ship’s
mail, loading encryption codes in the ships radios,
small boats, and helicopter, as well as troubleshooting
equipment problems, and performing various other
administrative duties. Although much of the work is
behind the scenes, and behind locked doors, the Communications Division plays a vital role in the operational success and continued
mission readiness of the ship.
As far as the work in Combat goes, again, this explains it much better than I can.
Working in the Combat Information Center (CIC), OS's collect, process, evaluate, and disseminate various types of information from air search radar, surface search radar, electronic signals, radio communications, intelligence, computerized command and control systems, and navigational equipment. Working closely with the bridge watchstanders, they ensure the safe navigation of the ship in time of limited visibility and congested vessel traffic. Underway OS's stand a four to eight hour watch, maintaining a constant radar surveillance advising the Commanding Officer and Officer of the Deck of any immediate traffic or hazards. OS's are an integral part of all missions, including search and rescue, protecting living marine resources, enforcement of laws and treaties, illegal migrant or narcotics interdiction, and military readiness.
Hope that helps you alittle bit. Hope things are going well up there in Seattle, SA Alma! Take care of yourself.