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USN1120

Submarine Warfare Officer

Serves aboard nuclear-powered submarines managing propulsion, weapons, and navigation systems.

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Recruiter vs. Reality
What they tell you

As a Submarine Warfare Officer, you'll lead the most survivable and lethal platform in the United States military — nuclear-powered submarines that operate beneath the ocean's surface for months at a time. You'll master nuclear engineering, tactical operations, and the art of undersea warfare. Submarine officers are among the most technically proficient leaders in any military, and their skills command premium salaries in nuclear energy, defense, and executive leadership.

What it's actually like

You are a Submarine Officer, which means you voluntarily chose to live inside a metal tube underwater for months at a time, and the Navy rewards this decision with a nuclear engineering education and the most exclusive culture in the military. Your 'submarine warfare' is weeks of boredom punctuated by moments of pure adrenaline when you're running from something or running toward something, and you can't tell your family about either. You'll qualify to run a nuclear reactor, navigate underwater without GPS, and sleep in a rack the size of a coffin. The nuke pipeline produces some of the most technically capable officers in any branch. The submarine culture produces some of the most insane inside jokes in human history. Both are earned.

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MOS Intel

ClearanceTop Secret
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PromotionFast
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Deploy TempoHigh
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BonusUp to $35,000 (nuclear officer accession bonus)
Career Intel
Duty StationsGroton (CT) · Kings Bay (GA) · Bangor (WA) · Pearl Harbor (HI) · San Diego (CA)
Daily LifeSubmarine operations — standing watch as Officer of the Deck, Engineering Officer of the Watch, or Diving Officer. Managing divisions of nuclear-trained enlisted sailors. The pace is intense and the responsibility is enormous from day one. You are standing watches and making decisions on a nuclear-powered submarine within months of reporting aboard.
AIT / SchoolNuclear Power School at Charleston (SC) is 6 months of intensive nuclear engineering academics. Prototype (NPTU) at Charleston or Ballston Spa (NY) adds 6 more months of hands-on reactor operation. Submarine Officer Basic Course (SOBC) at Groton (CT) adds 3 more months. Total pipeline: 15-18 months. The academic rigor is equivalent to a graduate engineering program compressed into one year.
Physical DemandsLow to moderate. Submarine life is physically constrained (tight spaces, no exercise facilities on most boats). The mental and psychological demands far exceed the physical.
DeploymentsFast-attack submarines: 6-7 month deployments; SSBNs: Blue/Gold rotation with 3-month patrols and 3 months off-crew
Certifications
Submarine Warfare Officer (Dolphins)Nuclear Engineer OfficerOfficer of the Deck (Submarine)Engineering Officer of the Watch (Nuclear)
Pro Tips
  1. 1The nuclear pipeline will be the hardest academic experience of your life. Embrace the study culture — the officers who struggle are the ones who try to coast on their undergraduate performance.
  2. 2Your nuclear engineering credentials and leadership experience make you one of the most sought-after military officers in corporate America. Fortune 500 companies (especially energy, consulting, and tech) actively recruit submarine officers.
  3. 3The submarine officer continuation bonus is substantial ($75K-$100K+) because the Navy knows your skills are worth more on the outside. Consider the full picture before making career decisions.
The Honest Truth

Submarine Warfare Officer is arguably the most intellectually demanding career path in the military. The recruiter will highlight the nuclear training, the leadership, and the prestige — all earned and all real. What they won't tell you: you will spend months underwater with no sunlight, no contact with family, and the knowledge that your decisions could have strategic nuclear consequences. The sleep deprivation is chronic and systematic. The nuclear pipeline is academically crushing — the attrition rate is real and there's no coasting. But the officers who complete a submarine tour emerge with credentials that the civilian world deeply respects. Fortune 500 companies, management consulting firms, and venture capital actively recruit submarine officers for their decision-making under pressure, technical depth, and leadership experience. The post-military earning potential is among the highest of any military career path ($120-200K+ within 2-3 years of transition). The cost is paid in years of personal sacrifice. Go in with eyes open.

Execute the Job — By Rank

How you actually run this job at each rank — what you do, what you drill, which manuals you own, and what good looks like. Written for the soldier, sailor, airman, Marine, or Guardian currently in the seat. Each rank deeplinks into the full Playbook deep-dive: time-blocked schedules, unit-type variations, career decisions, and the read on the next rank.

O1-O2ENS — LTJG (Nuclear Pipeline / First Sea Tour, earning dolphins)

You are the most heavily vetted officer in the wardroom and the least experienced person standing watch. The nuclear pipeline screened you, the Admiral interviewed you, and the reactor plant will expose every gap in your preparation — your job is to learn the submarine before it decides you are not worth the investment.

What You Actually Do

You commission through USNA, NROTC, or OCS and pass the Prospective Nuclear Officer (PNO) interview — a face-to-face with the Director of Naval Reactors, the only community in the Navy where the Admiral personally screens every candidate before accession. The pipeline after selection is fixed and long: Nuclear Power School (NPS) at Naval Nuclear Propulsion Training Command (NNPTC) in Goose Creek SC, six months of graduate-level nuclear engineering academics covering thermodynamics, reactor physics, nuclear chemistry, electrical theory, and radiological controls. NPS is not a survey course. The daily load and the grading are serious. You will study in the evenings and you will not enjoy every moment. After NPS, Naval Nuclear Power Training Unit (NPTU) — also at Goose Creek, or at a second prototype site — six months of hands-on operation of an actual land-based naval reactor plant: standing qualifications, earning watch stations, demonstrating that what you learned in the classroom translates into safe reactor plant operation under realistic casualty scenarios. The academic-to-practical translation that NPTU demands is where officers find out whether they actually own the material. After NPTU, Submarine Officer Basic Course (SOBC) at Naval Station Groton CT: submarine tactics, doctrine, weapons systems, and the operational culture of the silent service before you report to your first boat. Your first submarine is an SSN (fast attack) or an SSBN (ballistic missile submarine); the specific hull assignment comes from NPC detailing. Aboard ship, you own a division — Weapons, Navigation, Sonar, Reactor, depending on the boat's organization — and you are working the submarine qualification PQS (Personnel Qualification Standards) from the first day aboard. The submarine warfare officer qualification, governed by OPNAVINST 1412.14 (or successor), requires you to demonstrate system-by-system knowledge of every major submarine system and pass a formal qualification board before you earn the Submarine Warfare Officer insignia — dolphins. The clock is running from report-aboard. You will stand junior watchstander duties, write EVALs on your division, brief the department head on your equipment's material readiness, manage your division's maintenance schedule, and learn the ship. Simultaneously. The unglamorous description: a great deal of studying the PQS binder after working hours, standing mid-watches, and being junior in a wardroom where the Chief of the Boat has more experience than most people you have ever met.

Key Skills to Drill
  • 01Complete Nuclear Power School and Naval Nuclear Power Training Unit (NPTU) to NPS/NNPTC standard — demonstrate mastery of nuclear theory and reactor plant operations before every subsequent qualification rests on top of that foundation.
  • 02Work the submarine qualification PQS per OPNAVINST 1412.14 (or successor) — methodically interview each system, earn each watchstation endorsement, and present to the qualification board with a knowledge base the board cannot break. Dolphins earned late are an invisible flag in the wardroom.
  • 03Lead a submarine division: own PQS completion rates for your enlisted personnel, write defensible EVALs, manage maintenance schedules and material readiness, and brief the department head on your spaces with numbers that do not require a caveat.
  • 04Stand progressive watch stations — from observer to junior watch officer to Officer of the Deck (OOD) qualification — understanding that an OOD on a submerged nuclear submarine is responsible for the safe operation of the ship and the reactor plant simultaneously.
  • 05Execute SSBN-specific nuclear weapons qualification requirements if assigned to a ballistic missile submarine — additional certification requirements under COMSUBLANT / COMSUBPAC guidance that run parallel to the basic submarine qualification and are not optional.
  • 06Submit an accurate FITREP support form to your rater every reporting period — document divisional accomplishments, qualification milestones, and watchstanding progression with concrete metrics. The support form the department head receives verbatim writes your first-tour FITREP narrative.
Manuals & References
  • OPNAVINST 1412.14 (or successor) — Submarine Warfare Officer Qualification Program; the governing instruction defining qualification requirements, timeline standards, and the board process for earning the submarine warfare insignia.
  • NAVPERS 18068F (Rate Manual / Naval Military Personnel Manual) and MILPERSMAN 1000-series — personnel policy governing your division's enlisted advancement, administrative separations, and the NJP process; know the articles your division's Sailors live under.
  • NWP 3-21 series — Submarine Warfare publications; the operational doctrine framework your boat trains against and the tactical framework SOAC/SOBC built into your preparation.
  • OPNAVINST 6110.1 series — Navy Physical Readiness Program (PRT / BCA standard); your submarine runs an independent command PRT cycle, and the command expects the standard.
  • Nuclear Power School course materials and NPTU watch qualification standards — the technical foundation everything aboard ship rests on. If NPS material went stale in your memory during SOBC, fix that before the first reactor plant qualification board.
  • Your submarine's Commanding Officer's Standing Orders and the Ship's Tactical Manual — the CO's law, specific to your hull; you are expected to know the standing orders without being asked and without reaching for the binder.
Standards You Must Hit
  • Nuclear Power School graduate (NNPTC Goose Creek SC, six months) — the academic gate; NPS academic standing is visible in your record through your entire nuclear career.
  • NPTU / Naval Nuclear Power Training Unit complete — hands-on reactor plant qualification at a prototype site; the practical competency certification that validates NPS academics.
  • Submarine Officer Basic Course (SOBC) graduate, Naval Station Groton CT — the pre-fleet tactical and operational foundation course for the submarine community.
  • Submarine Warfare Officer Insignia (dolphins) earned per OPNAVINST 1412.14 (or successor) within the command's expected timeline — the qualification gate that ends the probationary window aboard the boat.
  • PRT pass (Good or better) and BCA in standard per OPNAVINST 6110.1 — the command runs PT and the boat tracks the results; your division watches whether the JO holds the standard they enforce.
  • FITREP relative ranking in the top half of peer division officers by the second reporting period — pull current NPC guidance on EP% allocation and understand what your ranking means before the report closes.
Common Technical Mistakes
  • Letting the PQS binder drift. Dolphins earned at or beyond the warning point are noted by the wardroom, the COB, and the department head — it is the first data point in the "does this officer have what it takes" read, and it propagates to the first FITREP narrative.
  • Walking into a reactor plant qualification board unprepared. The board is not a formality. The senior watch officer and the Engineer Officer of the Watch expect you to demonstrate working knowledge of the systems, not a recitation that collapses under the first follow-on question. A failed board is documented.
  • Running a division without owning the numbers. The department head asks about your division's PQS completion rates, outstanding casualty reports (CASDREPs), and maintenance schedule at every sync. "I think most of them are close" is not a brief. Know your spaces.
  • Posting any information related to the boat's schedule, port calls, departure or return dates, equipment configurations, or operational status on social media. Submarine OPSEC is not a formality — the boat's operational advantage depends on ambiguity about its location and schedule. A violation at the division officer level is a CO-level event.
  • Mishandling nuclear radiological controls or reactor plant procedures, even in training evolutions. The nuclear propulsion program's safety record exists because procedural compliance is not a matter of judgment — it is a matter of policy. Deviations are investigated and documented regardless of whether there was a visible consequence.
What Good Looks Like

The good ENS/LTJG submarine officer earns dolphins ahead of the warning-point timeline, runs a division whose PQS completion rates brief clean at every department head sync, and stands an OOD watch the CO endorses without hesitation. The department head does not rewrite the EVALs. The COB knows the officer's name because the division petty officers said the right things — not because there was a problem. By the end of the first sea tour, the XO is putting this officer on the DH school nomination conversation because the boat ran correctly when he had the watch.

Go Deeper at O1-O2
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full O1-O2 Playbook →
O3-O4LT — LCDR (Department Head / XO track, operational submarine)

You are either a LT fighting for Submarine Officer Advanced Course selection — the Key Developmental gate that almost no one is honest with themselves about how competitive it is — or an LCDR who has completed the department head tour and is now deciding whether the command screen is a realistic trajectory or whether the submarine force has given you everything it intended to and it is time to make a different decision.

What You Actually Do

After the first sea tour you move into the LT window: shore or staff billet (SUBLANT / SUBPAC staff, NPC, NAVSEA, or a major command), and then the Submarine Officer Advanced Course (SOAC) nomination conversation with your NPC detailer. SOAC at Naval Station Groton is the department head school prerequisite — the gated course that prepares submarine officers for the Key Developmental department head tour aboard an operational submarine. Selection for SOAC is not automatic; NPC reads your FITREP relative rankings, your first-tour dolphins qualification timeline, your post-first-tour billet performance, and your year-group competition. The officers who do not select for SOAC do not command submarines. That is the honest outcome and it happens every year. The department head tour — typically 18-24 months as Engineer Officer (ENG), Weapons Officer (WEPS), or Navigator (NAV) aboard a commissioned SSN, SSBN, or SSGN — is the KD billet. It is the department head tour FITREP, specifically, that the LCDR board reads with the most weight and that the command screen board reads before any other document in the package. As Engineer Officer you are responsible for the safe and reliable operation of the submarine's nuclear propulsion plant and all engineering systems — the ENG is the CO's most technically demanding department head billet and the one the nuclear propulsion program watches most closely. As WEPS you own the submarine's weapon systems, torpedo room readiness, and fire control. As NAV you own the navigation systems, charts, and the bridge qualification program. Across all three billets you are running a department of chiefs and petty officers who in some cases have been operating their systems longer than you have been commissioned, you are standing your own watch rotation as Officer of the Deck and qualified Nuclear Watch Officer, you are writing FITREPs on every Sailor in your department, and you are submitting material readiness reports that go to the CO without the XO having to fix them. The LCDR gate is where the submarine community sheds a portion of its officers — through non-selection, through voluntary separation at the minimum service obligation decision point, or through a deliberate move to the civilian sector. The submarine force's retention incentives (current NAVADMIN SRB / retention bonus messaging — pull the actual detailing message rather than relying on year-old peer knowledge) are the financial context. The civilian market for officers with nuclear propulsion backgrounds is genuinely strong; the decision to leave at the DH window is not a failure and this platform does not characterize it as one.

Key Skills to Drill
  • 01Run a submarine department — Engineering, Weapons, or Navigation — as the officer responsible for personnel readiness, material condition, maintenance schedules, and departmental watchstanding qualification; brief the CO on department posture with numbers that do not require the XO to walk back the brief afterward.
  • 02Operate as a qualified Officer of the Deck and senior nuclear watchstander on a commissioned submarine — standing independent OOD watches, managing tactical situations, and bearing the personal accountability that the submarine force places on the OOD for the safe operation of the ship.
  • 03Write FITREPs on enlisted Sailors and write EVALs on junior officers within your department that are honest, differentiated, and competitive — relative rankings the wardroom can defend and narrative bullets tied to observable outcomes the promotion board can read without a translation layer.
  • 04Navigate the SOAC selection and NPC detailing process with clear eyes — know your FITREP relative ranking profile, your year-group's promotion health, and the timing of the SOAC nomination conversation with your detailer. Officers who manage this relationship proactively are placed by plan; officers who don't are placed by default.
  • 05Execute the nuclear propulsion plant oversight requirements of the Engineer Officer billet if assigned ENG — the ENG is personally accountable to the CO and to the nuclear propulsion program for the reactor plant's material condition, watchstander qualifications, and procedural compliance. The Naval Reactors representative interacts with the ENG, not only the CO.
  • 06Understand the command screen math before the first pre-command package conversation: what the COMSUBLANT / COMSUBPAC command screening board precept is evaluating, how the department head tour FITREP propagates into the XO screen, and whether the XO / CO path is realistic for this officer in this year-group.
Manuals & References
  • OPNAVINST 1412.14 (or successor) — Submarine Warfare Officer Qualification; at the DH tier you are running the qualification program for your department's officers and maintaining your own senior watch qualifications; know what the instruction requires at each level.
  • OPNAVINST 1306.2 (or successor) — Officer Detailing Policy; the governing instruction for NPC's SOAC nominations, department head billet slating, and the post-DH assignment window for 1120 designators.
  • NAVPERS 1610-series / OPNAVINST 1616 — FITREP and EVALREP instructions; you are writing FITREPs on Sailors and junior officers now; know the EP% cap, the relative ranking mechanics, and the administrative routing chain.
  • NWP 3-21 series — Submarine Warfare publications; the tactical and operational doctrine framework your department executes against and that the XO and CO expect you to own at the department head tier.
  • MILPERSMAN 1000-series — at the DH tier you are executing personnel actions: NJP counseling, administrative separations, advancement recommendations, and the UCMJ reporting chain. Know what you can sign and what goes to the CO.
  • Current COMSUBLANT / COMSUBPAC Command Screening Board precept (available from NPC / MyNavy HR) — read the actual language of what the board is evaluating before the first XO application is submitted. Do not rely on what your predecessor told you the board cares about.
Standards You Must Hit
  • Submarine Officer Advanced Course (SOAC) graduate, Naval Station Groton CT — the required gate before the Key Developmental department head tour; non-selection is a career branch point with no appeal path inside the submarine community.
  • Department head tour complete — 18-24 months as Engineer Officer, Weapons Officer, or Navigator on a commissioned submarine; the FITREP from this tour is the most consequential document in the package at the LCDR board and command screen.
  • LCDR promotion board (IPZ per current NPC NAVADMIN board release) — pull the current year-group selection rate from NPC's published results; do not estimate from historical rates in a changed force structure.
  • XO / CO command screen — the competitive selection gating the command path; pull the current COMSUBLANT / COMSUBPAC command screening board precept from NPC to understand the actual evaluation criteria.
  • PRT pass and BCA in standard per OPNAVINST 6110.1 for every reporting period — a fitness failure on a department head FITREP is visible at the command screen in a way that a JO fitness flag is not.
Common Technical Mistakes
  • Treating the post-first-tour shore billet as a break. The FITREP from the SUBLANT/SUBPAC staff billet, the NAVSEA billet, or the NPC tour is the one the detailer reads alongside the sea-tour FITREPs when recommending for SOAC. A visible coast in the inter-tour billet is a visible signal in the SOAC nomination conversation.
  • Missing the NPC detailer conversation before the SOAC nomination window closes. SOAC nominations do not arrive by themselves — they are the product of a proactive relationship between the officer and the NPC detailer at a specific timeline. Officers who assume the system will nominate them because they qualified on time are sometimes right; they are also sometimes wrong, and they find out after the window has passed.
  • Running the ENG billet without understanding that the Naval Reactors representative has an independent reporting channel to Naval Reactors that does not go through the CO first. The ENG is the front-line accountable officer for reactor plant material condition and procedural compliance. A finding that reaches NAVSEA 08 before it reaches you is a leadership failure at the department head level.
  • Writing FITREPs on your division officers or EVALs on your Sailors that are inflated, vague, or inconsistent across reporting periods. The XO scrubs every report before it goes to the CO; a department head who cannot write honest, differentiated evaluations is a department head the XO has to rewrite in real time, and that pattern surfaces at the command screen.
  • Staying past the minimum service obligation without an honest analysis of the command screen probability and the personal cost of the XO/CO path. The civilian nuclear sector — commercial power, naval architecture, defense contracting — actively recruits officers with submarine nuclear propulsion experience. Making the decision to leave on purpose, with a plan, at year 9 or 10 is structurally different from making it under duress at year 13. The platform respects both outcomes; make the choice with clear eyes.
What Good Looks Like

The good submarine department head is the officer the CO names in the SOAC debrief as a future CO — not because he managed the relationship with the wardroom well, but because the department ran clean under his watch. The reactor plant briefed operationally ready without caveats, the Sailors' EVALs were differentiated and honest, the material readiness reports went to the CO without XO correction, and the tactical picture was accurate every time he had the OOD watch. The good LCDR has the command screen conversation in the back of the brief because the FITREP profile built itself from genuine performance across two billets. Whether the XO tour and CO screen follow, or whether the transition to commercial nuclear, defense contracting, or an advanced degree program is the right next step — the officer who is worth keeping makes that decision with intention before the submarine force makes it for him.

Go Deeper at O3-O4
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full O3-O4 Playbook →
Training Pipeline
1
OCS or USNA13w
Newport (RI) or Annapolis (MD)
2
Submarine Officer Basic Course (SOBC)20w
Groton (CT)
Nuclear propulsion, submarine operations, systems qualifications.
3
Nuclear Power School24w
Goose Creek (SC)
Intensive nuclear engineering curriculum — one of the most rigorous academic programs in the military.
On the Outside

What this actually is in the real world

Your skills translate. Here's what civilian employers call this job — and what they pay.

Nuclear Engineers

Strong match
$125,290$78,480$185,720/yr median
Job market: Average (8%)

Ship Engineers

Related field
$87,620$52,430$142,650/yr median
Job market: Average (4%)

Electrical Engineers

Related field
$107,890$68,020$165,000/yr median
Job market: Average (9%)

Salary data from the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics program, retrieved Feb 2026. BLS.gov cannot vouch for the data or analyses derived from these data after the data have been retrieved from BLS.gov.

MOS Pulse

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FAQ

1120 Submarine Warfare Officer — FAQ

Q01What does a 1120 do in the Navy?
You commission through USNA, NROTC, or OCS and pass the Prospective Nuclear Officer (PNO) interview — a face-to-face with the Director of Naval Reactors, the only community in the Navy where the Admiral personally screens every candidate before accession.
Q02How long is 1120 training and where is it held?
1120 training is approximately 26 weeks of Advanced Individual Training (AIT) after Basic Combat Training, held at Naval Submarine School, Groton, CT.
Q03What security clearance does a 1120 need?
1120 typically requires a Top Secret security clearance, granted after a background investigation.
Q04What does a day in the life of a 1120 look like?
Submarine operations — standing watch as Officer of the Deck, Engineering Officer of the Watch, or Diving Officer. Managing divisions of nuclear-trained enlisted sailors. The pace is intense and the responsibility is enormous from day one. You are standing watches and making decisions on a nuclear-powered submarine within months of reporting aboard.
Q05What civilian jobs does 1120 translate to?
1120 maps most directly to civilian occupations including Nuclear Engineers. Translation quality varies by skill — see the Honest MOS Civilian Translation block for full O*NET matches and salary data.
Q06How often do 1120 soldiers deploy?
Deployment tempo for 1120 is high — expect deployments roughly every 18-36 months. Fast-attack submarines: 6-7 month deployments; SSBNs: Blue/Gold rotation with 3-month patrols and 3 months off-crew
Q07What's the recruiter not telling me about 1120?
You are a Submarine Officer, which means you voluntarily chose to live inside a metal tube underwater for months at a time, and the Navy rewards this decision with a nuclear engineering education and the most exclusive culture in the military.
How does 1120 compare?
See side-by-side ratings, quality of life, and community takes.
Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards

Sources:Branch MOS catalog · DTMO pay tables · DoD/.gov benefits references · O*NET civilian career mapping · verified service-member reviews