Navy Sonar Technician – Submarines (STS): Definitive Guide
A Sonar Technician Submarines (STS) is an enlisted Navy job on submarines. You help the crew “see” underwater using sonar and acoustic data. Your work supports safe navigation and undersea tactical decisions.
STS is a long training pipeline compared to many ratings. You will learn submarine basics first, then build deep technical skills. After school, most learning continues on the boat through watchstanding and qualification programs.
ENLISTMENT BONUS: Future Navy FTs are currently eligible to receive up to $30K in cash bonus just for signing up.
Job Role and Responsibilities
Core mission
STS Sailors operate and maintain submarine sonar capabilities. You collect undersea data and support underwater surveillance. You also help the team track contacts and build an accurate picture of what is around the submarine.
A big part of the mission is turning raw sound into usable information. That means careful listening, signal classification, and steady teamwork. You will often work under time pressure, but you must still be precise.
What you do day to day
Most STS work centers on watchstanding and equipment care. Your day commonly includes tasks like these:
- Stand sonar watch and monitor contacts.
- Detect, classify, and track sounds in the ocean.
- Log and report contact information to the control team.
- Run built-in tests and troubleshoot sonar equipment.
- Perform scheduled maintenance and calibrations.
- Train and drill with the team for readiness events.
The job mixes analysis with hands-on technical work. Some days are heavy on troubleshooting. Other days are heavy on tracking and reporting. Both matter because sonar feeds decisions that affect the whole ship.
Key systems and outputs you support
On a submarine, sonar is a major sensor set. STS work ties into the undersea combat system and the command team’s situational picture. Your outputs are usually contact reports, tracking updates, and equipment status updates.
You also support ship safety in quiet, practical ways. Good sonar performance helps avoid hazards and supports safe maneuvering in complex waters. That work is not glamorous, but it is real and constant.
Common specialties and Navy codes
The Navy uses NECs to mark specialized skills. STS can qualify into several sonar and undersea surveillance specialties over a career.
| Community | Code type | Example codes | What it usually signals | |
|---|---|---|---|---|
| Enlisted | Rating | STS | Sonar Technician (Submarines) | |
| Enlisted | NEC | T42A, T45A, T46A, T46B, T52A | Advanced sonar system specialties | |
| Enlisted | NEC | 708B, 709B, 711B, 712B, 714B, 715B | Undersea surveillance and analysis specialties |
Exact NEC options depend on fleet needs and your performance. You do not pick an NEC on day one. You earn it after time, training, and strong watchstanding.
Work Environment
Where you work
STS Sailors work on submarines in interior spaces. The sonar spaces are indoors and equipment-heavy. Some work feels like a technical shop with consoles, cables, and test gear.
Submarine life is different from surface ships. Space is tighter, privacy is limited, and routine matters more. You will be close to your team all day, even off watch. That closeness can be a strength or a stressor.
Watchstanding and daily rhythm
A submarine runs 24/7. Sonar watch is a core duty, and watch rotations can shift during operations. You must stay alert during nights, long periods of quiet, and sudden high-tempo moments.
Your schedule also includes drills, maintenance windows, and training time. You may study between events because qualifications never really stop. That pace can feel like school layered onto a job.
Team dynamics and leadership
STS work is tightly linked to the control team and other technical divisions. You will coordinate with watch supervisors, combat system teammates, and chain-of-command leaders. The job rewards clear reporting and calm behavior.
Small mistakes can spread fast in a submarine environment. A good STS speaks plainly, confirms details, and stays steady when tired. Trust is built through consistent accuracy, not big speeches.
Training and Skill Development
Entry pipeline and early schools
STS accessions are tied to the Submarine Electronics/Computer Field (SECF) path in Navy recruiting. In the submarine pipeline, all accessions attend Basic Enlisted Submarine School (BESS) and then the associated “A” school.
Navy recruiting describes BESS as a nine-week course in Groton, Connecticut. It prepares you for submarine life, safety, and basic skills before rating-specific school.
A Navy career path document for STS describes accession training as about nine months total, including recruit training and all schools. That number is a planning figure, not a promise, because class dates and pipeline changes can shift timelines.
| Stage | Typical location | What you build | |
|---|---|---|---|
| Recruit Training | Great Lakes, Illinois | Navy basics, discipline, and core skills | |
| BESS | Groton, Connecticut | Submarine fundamentals and readiness | |
| STS “A” School | Submarine training pipeline | Sonar systems, procedures, and technical foundations | |
| First command | Operational submarine | Watchstanding and ship qualifications |
What you learn in STS school and on the boat
School gives you the foundation. The boat makes you useful. You learn sonar operation, signal recognition habits, equipment care routines, and clear reporting. Over time, you build stronger judgment on what matters and what is noise.
You will also learn how submarine teams qualify. Qualification programs push you to master procedures, systems, and emergency actions. Progress comes from daily study, repeated drills, and honest feedback.
Advanced training and specialty growth
As you gain time and credibility, you may move toward specialized work. The Navy’s STS career path discusses an Acoustic Intelligence (ACINT) specialty track that can take many months to complete. It also notes that qualification can be difficult, with significant attrition in that path.
Even outside ACINT, you can earn advanced NECs. Those options usually require strong evaluations, proven watch performance, and the right orders. A steady record of reliability matters as much as raw intelligence.
Physical Demands and Medical Evaluations
Fitness requirements and PRT minimums
Active duty Sailors must meet Navy fitness standards. The Physical Readiness Test (PRT) uses events like push-ups, a plank, and a cardio event such as the 1.5-mile run. The Navy publishes performance tables by age and sex.
Below are minimum “Probationary” scores for the youngest bracket shown (Age 17 to 19) for push-ups, plank, and the 1.5-mile run. These numbers can change with official updates, so treat them as a baseline check.
| Event | Male 17–19 minimum | Female 17–19 minimum | |
|---|---|---|---|
| Push-ups (2 minutes) | 42 | 19 | |
| Plank | 1:11 | 0:51 | |
| 1.5-mile run | 12:45 | 15:15 |
STS training and submarine life also demand steady injury prevention. Tight ladders, ship movement, and long watches can punish weak mobility. Small habits like sleep discipline and careful lifting help more than heroic workouts.
Submarine-specific screening
STS is a volunteer submarine path. The Navy lists STS as requiring submarine volunteering and meeting submarine physical standards.
The same Navy rating list also shows background investigation screening language tied to STS. It references an SSBI and includes a PRP indicator on the STS line, which signals that some billets may carry higher screening expectations.
Hearing, fatigue, and long-term wear
Sonar work depends on strong attention and sound judgment. Fatigue can be a real risk on submarines because watch rotations and operations can compress sleep. You will need personal systems to stay sharp, like structured study time and smart caffeine use.
Hearing and focus matter because sonar is an information job. Even when you are not “listening” directly, you are working with sound-based data and acoustic interpretation. If you struggle to stay attentive in quiet settings, this job can feel harder than it looks.
Deployment and Duty Stations
What deployment can feel like
Submarines deploy on schedules that can change with mission needs. You should expect long stretches away from home, followed by busy in-port periods focused on maintenance, inspections, and training. The cycle often feels like two jobs: one at sea and one in the shipyard environment.
During operations, sonar workload can swing fast. Quiet periods can last for hours, then a complex situation can demand full focus for a long time. You learn to manage your energy and keep your reports clean when stress rises.
Duty station patterns for STS
STS assignments are submarine-driven. That usually means submarine homeports, submarine squadrons, training commands, or support activities tied to undersea warfare. Your first tour is commonly operational so you can qualify and build real watch skills.
Shore duty later can still be intense. Instructor roles, maintenance support, and staff billets can involve long days, frequent briefs, and constant deadlines. Shore does not always mean easy, but it is usually more predictable than deployment cycles.
How orders and rotations affect you
Orders reflect “needs of the Navy” first, but performance shapes options. Strong evaluations, good qualification speed, and low disciplinary risk tend to open better assignments. Weak reliability closes doors fast in a submarine community.
If you want more control, focus on what you can influence early. Earn trust, qualify on time, and keep your record clean. That pattern gives your detailer more reasons to fight for your preferences later. (Joel Schofer’s Career Planning Blog)
Career Progression and Advancement
Early career. Learning to be trusted
Most new STS Sailors start by mastering basics. You learn submarine routines, qualify watchstations, and prove you can handle responsibility without constant supervision. Early credibility often comes from small wins: clean logs, accurate reports, and good troubleshooting discipline.
In this stage, you also learn how much the job is about communication. A short, correct report beats a long, confusing explanation. People remember the Sailor who stays calm and correct during drills.
Mid career. Owning a watch and leading others
As you advance, you move from “qualified” to “dependable.” You may supervise watch sections, train junior Sailors, and take ownership of maintenance programs. You will also have more paperwork, more inspections, and more responsibility for how the team performs.
This is also where specialization can happen. The STS community includes advanced NEC paths and an ACINT track described in Navy career path material. Those paths can change your daily work and your long-term resume.
Senior career. Chief-level influence
Senior STS leaders shape training quality and operational discipline. You may lead divisions, manage readiness, and enforce standards that keep the boat safe and effective. The work becomes less about your own console time and more about how the whole team performs.
How advancement works in the Navy
The Navy advancement system uses a mix of performance evaluations, time-in-rate rules, exams, and selection boards. Enlisted advancement policy is governed by Navy instruction, and it distinguishes exam-based advancement from board-based selection at senior grades.
Your day-to-day behavior ties directly to advancement. Strong performance evaluations and strong exam prep tend to travel together. Poor conduct, weak reliability, and missing qualifications can slow a career for years.
Salary and Benefits
The building blocks of STS pay
STS pay is not a single number. It is a stack of entitlements that can include basic pay, allowances, and special pays. The biggest pieces for many submarine Sailors are:
- Basic pay, based on rank and years of service.
- BAS, a monthly food allowance for eligible members.
- Career Sea Pay, based on paygrade and cumulative sea duty time.
- Submarine Duty Pay, based on paygrade and years of service.
- BAH, based on duty station and dependent status, when eligible (rates vary widely).
The table below shows example monthly totals using only DFAS-published items that have fixed tables. These examples exclude BAH, taxes, and other LES items that vary by location and situation.
| Example | Basic pay | BAS | Sea pay (example CSD) | Sub pay | Example monthly total | |
|---|---|---|---|---|---|---|
| E-3, 2 or less years | 2,836.80 | 476.95 | 50 (CSD 1 or less) | 90 | 3,453.75 | |
| E-4, 2 or less years | 3,142.20 | 476.95 | 70 (CSD 1 or less) | 90 | 3,779.15 | |
| E-5, over 4 years | 3,946.80 | 476.95 | 375 (example CSD over 4) | 275 | 5,073.75 |
Benefits that matter most in practice
Pay is only part of the compensation picture. Active duty Sailors also receive major non-cash benefits that affect real quality of life, like medical coverage, paid leave, and housing support when eligible. Education benefits can be a major long-term value if you use tuition support and plan for credentials.
Submarine pay and sea pay can add meaningful monthly income, but they come with tradeoffs. The extra money is tied to tough schedules and time away. Most people who thrive in STS treat the pay as a bonus, not the reason to join.
Risk, Safety, and Legal Considerations
Operational and workplace risk
Submarine work involves inherent risk because you operate at sea in a complex environment. Common risk categories include shipboard emergencies, equipment hazards, and fatigue. In sonar spaces, you also deal with electronics and troubleshooting under pressure.
STS risk is often less about “dangerous moments” and more about “constant consequences.” If you miss a detail, the team may build a wrong picture. That can affect decisions on navigation, tactics, and safety margins.
Safety culture and procedural discipline
Submarines run on procedures. Your daily habits matter, including tag-out discipline, maintenance documentation, and correct reporting. A strong safety culture is built through repetition, peer checks, and honest correction.
Drills are not just theater on a submarine. The goal is automatic, correct action under stress. If you dislike strict procedural compliance, STS can feel restrictive. If you like clear standards, the environment can feel fair.
Security, screening, and conduct
The Navy lists STS with a background investigation requirement and includes an SSBI reference on the STS entry. It also shows a PRP indicator for STS on the rating list, which points to higher screening expectations in some cases.
The same Navy rating list includes drug-related disqualifying language in the STS block. It specifically notes no convictions for drug abuse offenses (with marijuana called out separately) and no other drug or alcohol dependency.
Military conduct rules apply across the Navy. In practice, submarine communities tend to enforce standards tightly because trust is a survival requirement.
Impact on Family and Personal Life
Time away and schedule strain
Submarine operations can mean long time away from home. Even in port, the schedule can be heavy due to maintenance and training demands. That mix can strain relationships when expectations are not clear.
Many STS families do best with routines. A shared calendar, stable finances, and clear childcare backups reduce stress. You cannot “wing it” for long when the Navy schedule shifts quickly.
Communication realities
Submarine communication is often limited compared to other Navy jobs. That can make everyday connection harder, even when things are going well. It also means family problems at home can feel more distant and frustrating.
Because communication can be constrained, trust habits matter. Couples who already handle distance well often adjust faster. People who need constant contact may struggle more.
Personal life on the boat
On a submarine, you live close to coworkers. You need patience, good hygiene discipline, and emotional control. Small conflicts can grow if you let them sit. A calm approach and direct problem-solving keep life easier.
STS can also build deep friendships because the team shares hard experiences. That social support helps many Sailors manage stress, especially during long operations.
Post-Service Opportunities
Skills that translate well
STS builds technical and analytical skills that transfer to civilian work. You learn structured troubleshooting, equipment maintenance discipline, and operational reporting. You also build comfort with complex systems and high accountability.
If you earn advanced NECs, your resume can shift toward more specialized roles. Even without an NEC, a strong submarine record can signal reliability under pressure. That is valuable in many technical fields.
Civilian career prospects (BLS snapshots)
Below are examples of civilian occupations that often align with parts of STS skill sets. Pay and outlook are national BLS figures and can vary by location and experience.
| Related civilian role | BLS median pay (May 2024) | BLS outlook (2024–2034) | Why STS experience helps | |
|---|---|---|---|---|
| Electrical and electronic engineering technologists and technicians | $77,180 | +1% | Electronics, testing, technical documentation | |
| Electro-mechanical and mechatronics technologists and technicians | $70,760 | +1% | Troubleshooting systems and repair discipline | |
| Computer network support specialists | $73,340 | +2% | Technical support mindset and systems thinking | |
| Electrical and electronics installers and repairers | $71,270 | 0% | Diagnostics, maintenance, and safety procedures |
How to make your Navy experience “read” to employers
STS resumes can fail when they are too “Navy-coded.” Translate your work into plain outcomes:
- Replace watchstation jargon with “real-time monitoring and reporting.”
- Describe maintenance as “preventive maintenance and fault isolation.”
- Quantify responsibility, like number of systems or hours on watch.
- Highlight training roles, not just technical skill.
If you plan early, you can leave the Navy with certifications, a cleaner transcript, and stronger references. That planning should start in your first sea tour, not your last month.
Qualifications and Eligibility
How STS is accessed for new Sailors
The Navy’s rating list notes, “For Accessions, see SECF” on the STS line. That means many new Sailors enter through the SECF program and then go to submarine schools and the associated “A” school.
The same document states that all submarine accessions must attend BESS and the associated rating “A” school.
ASVAB and technical qualification
SECF entry uses specific ASVAB composites. The Navy rating list shows SECF composite options as:
- AR + MK + EI + GS >= 200, or
- VE + AR + MK + MC >= 200
Your actual eligibility depends on your full test scores and current program rules. If your scores are close, improving math and mechanical knowledge can change your options quickly.
Submarine volunteering and screening
STS requires submarine volunteering and meeting submarine physical standards. The rating list also shows an SSBI reference on the STS entry and includes a PRP indicator.
The same STS block includes drug and dependency restrictions. It states no convictions for drug abuse offenses (with marijuana listed separately), no other drug or alcohol dependency, and no hallucinogenic use, with peyote called out in the PRP context.
What helps you stand out early
The strongest predictors of success are not mysterious:
- You enjoy quiet focus and detailed work.
- You can learn technical material fast and retain it.
- You handle criticism without shutting down.
- You communicate clearly when tired.
If those traits sound like you, STS can be a strong fit. If they sound awful, another Navy path may match better.
Is This a Good Job for You? The Right (and Wrong) Fit
The right fit
STS tends to fit people who like technical depth and steady routines. You do well when you can focus for long periods and still stay calm. You also need comfort with strict procedures and frequent evaluations of your performance.
It also helps if you enjoy teamwork but do not need constant praise. Submarine crews rely on quiet competence. The best STS Sailors often take pride in doing hard things without drama.
The wrong fit
STS may be a poor fit if you struggle with confined living or unpredictable sleep. It can also be a bad match if you hate studying after work or dislike structured rules. You will be expected to qualify, re-qualify, and train others over time.
If you need frequent social variety, submarine life can feel repetitive. If you do not manage stress well, quiet tension can build. In that case, a job with more daylight routine might suit you better.
Quick self-check
Answer these honestly:
- Can I stay accurate when I am tired?
- Do I enjoy technical systems and structured troubleshooting?
- Can I live and work in tight spaces for long periods?
- Do I communicate clearly without overexplaining?
If most answers are “yes,” STS is worth serious consideration.
More Information
If STS sounds like the right kind of technical pressure and team life, talk with a Navy recruiter and ask specifically about SECF entry standards, current screening requirements, and the expected training timeline for your ship date. A good recruiter can explain how submarine volunteering works, what qualifies you for STS, and what your first years are likely to look like.
You may also be interested in the following related Navy Enlisted jobs: