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FTE4

Fire Control Technician

E-4 (Specialist/Corporal) · Navy

E1–E3E-4E-5E-6E-7E8–E9
HEADS UP

FT3 (E-4) with Dolphins on your chest is the first rank where you stand a productive fire control watch. The qualification is earned; now the standard shifts to how well you perform at it. The NWAE cycle for FT2 is the professional clock running in the background from the day you pin third class — advancement in the FT rate is competitive, and the FT3 who treats the BIB as optional finds out what competitive means when the advancement results post.

The Honest MOS Read
Fire Control Technician Third Class is the rank where the submarine qualification card is behind you and the job actually begins. You have Dolphins on your chest — the credential the submarine community requires to trust you on watch — and you have at least a foundational fire control watch qualification in progress or completed. The next two years are about proving that the trust is warranted. Your operational role at FT3 is the working fire control watchstander and maintenance technician. In the control room during an exercise or a real-world operation, you sit the fire control panel responsible for generating and maintaining the boat's tactical solution — the continuously updated targeting track that the watch officer uses for weapons employment decisions. The fire control solution is not automatic; it requires active management, track correlation, and judgment about when to brief the watch officer that the solution has degraded or that contact data is ambiguous. The FT3 who presents a stale or overconfident solution to the watch officer without flagging its limitations is the FT3 who fails the post-exercise debrief. In the torpedo room and on the maintenance bench, you perform scheduled and corrective maintenance on the torpedo tube mechanical systems — outer door and breech door mechanisms, tube pressurization, interlocks, associated hydraulic or pneumatic equipment — and on the fire control system's computing and display hardware. The 3-M maintenance management system governs everything you document; an entry you sign for is an entry you own. If the SIB reviews the maintenance log after an incident, your initials are the signature on the corrective action you documented. The training role begins at FT3 as well. You are a task demonstrator for FTSNs working their qualification cards — the submarine community uses a tiered qualification system where FT3s who have completed a section sign off on FTSNs working through that section. The standard for a task demonstrator sign-off is that you personally observed the FTSN demonstrate the knowledge or skill; a rubber-stamp sign-off without observation owns the FTSN's gaps. The NWAE cycle for FT2 is not a background concern at FT3 — it is the primary career driver. Advancement in the submarine fire control community is competitive. The Bibliography for Advancement that NETC publishes for each NWAE cycle is the test material; FT3s who pull the current BIB, build a study plan with milestone checkpoints, and begin the Electronic Advancement Workbook early are the ones who advance on the first eligible cycle. The chief tracks the FT3 NWAE prep as part of the division's readiness picture — not as a personal favor, but because the advancement profile of the division reflects on the chief's leadership.
Career Arc
  • 01Pin FT3 with Dolphins; complete the first fire control watch-standing qualification and begin standing productive watches in the control room.
  • 02Begin NWAE study cycle for FT2 advancement — pull the current BIB from MyNavyHR/NETC and build a study plan with milestone dates the chief can track.
  • 03Earn advanced fire control watch qualifications beyond the initial certification — the FT3 who maxes out at the minimum qualification tier is not performing at rate.
  • 04Obtain weapons-handling certification and participate in a torpedo load/offload evolution as a certified team member.
  • 05Train at least one FTSN through a submarine qualification section or a fire control PQS line item as a qualified task demonstrator.
  • 06Build the eEVAL record — trait averages and relative ranking — that positions for an EP or MP recommendation ahead of the FT2 slate.
  • 07Advance to FT2 on the first competitive NWAE cycle; if not selected, the BIB and the study log are the first things the chief reviews with you.
Common Screwups
  • ×Presenting a stale or unconfident fire control solution to the watch officer without flagging its limitations. The watch officer depends on the FT3 to maintain an accurate tactical picture and to communicate uncertainty — a watch officer making an employment decision on a solution the FT3 knew was degraded is a post-exercise debrief that ends careers.
  • ×Closing a tube maintenance log entry with a corrective action that describes intent rather than execution — 'checked and serviced per PM' with no documented detail. The SIB reads the last maintenance entry first; the FT3 who wrote a vague log entry owns the finding.
  • ×Rubber-stamping a FTSN qual sign-off without actual observation. The qualification system depends on the task demonstrator having personally observed the performance; a sign-off without observation that later surfaces as a gap in the FTSN's knowledge is traced back to the FT3 who signed it.
  • ×Attempting fire control system repairs outside the qualification level without a qualified FT present. Unauthorized modifications to a fire control system are a certification and safety compliance issue investigated at command level.
  • ×Treating the NWAE BIB as optional or last-minute. The FT3 who fails to advance on the first eligible cycle watches peers advance and the chief's evaluation language shift — 'potential for advancement not yet demonstrated' is the sentence that follows a failed NWAE cycle.

A Day in the Life

  • 0530Wake, shower, muster. If standing watch that day, the watch rotation dictates the entire schedule — the port-and-starboard or three-section watch bill replaces the standard upkeep day structure when underway.
  • 0600–0630Morning quarters on the pier or on deck in port. The LCPO uses quarters to assign the day's maintenance priorities and announce any qualification sign-off opportunities.
  • 0630–0800Physical training — PRT components and unit fitness. Submarine schedules in port typically block PT before maintenance to ensure it happens; underway, PT is fitted between watch rotations.
  • 0800–0900Division maintenance muster: FT3 receives specific work order assignments from the LPO or section chief. The work order package for the day — MRCs, material requirements, tools — should be staged before arriving at the evolution space.
  • 0900–1130Torpedo tube or FCS maintenance evolution: execute the MRC per procedure, log every finding and action in the 3-M system, brief the section chief on status at the end. If the evolution runs into a fault requiring corrective maintenance beyond the PM scope, the FT3 writes it up and escalates to the FT2.
  • 1130–1300Lunch. If duty section, eat in rotation with the watch.
  • 1300–1500Afternoon maintenance, training evolution, or FTSN PQS qualification walk. FT3s who have FTSNs assigned to them for qual sign-offs typically schedule sign-offs in this window.
  • 1500–1630NWAE study — dedicated block. The FT3 who treats this window as optional is the one who runs out of study time before the NWAE window. The LPO should see study progress, not just hear about it.
  • 1630–1700End-of-day workup: restore work spaces, verify all open 3-M entries are documented, brief the section chief on any deferred discrepancies from the day's maintenance.
  • 1700–1900Personal time, or duty section watch rotation. Duty FT3 on a submarine in port may be called for any maintenance discrepancy or safety event that arises overnight.
  • 1900–2100NWAE study, advanced qualification study, or admin (eEVAL input drafts, evaluation preparation). The FT3s who advance early are doing this work consistently in the evenings.
  • 2100Wind down; lights out in berthing. Underway, this block is the watch rotation — there is no personal evening schedule at sea.

Weekly Cadence

In a standard upkeep week in port, the fire control division's rhythm is: morning PT and quarters, a maintenance production period from roughly 0800 to 1600 with a lunch break, and personal time in the evening. The weekly maintenance schedule is driven by the 3-M system's PM due-date tracking — the section chief has a production board that shows what is due this week, what is deferred, and what is coming next week. An FT3 who knows the board without being asked demonstrates that they own their section's maintenance picture. The week changes when the boat is in a pre-deployment workup or a tactical readiness certification period. Maintenance tempo increases sharply, certification deadlines compress, and the qualification currency checks become part of the daily brief. An FT3 who has deferred maintenance items or lapsed certifications entering a workup period is visible to the weapons officer and the department head in ways that do not occur during routine upkeep. Underway, the week is the watch rotation. Three-section watches — eight hours on, sixteen off — replace the port-based structure with a rhythm defined by the boat's operational schedule. Maintenance, qualification work, and NWAE study happen in the off-watch time. The FT3 who builds a personal schedule for off-watch time — maintenance first, study second, sleep third — arrives home from a patrol with his professional metrics moving; the one who treats underway time as survival mode does not.

Key Skills — How to Drill Each

  1. 01
    Stand a qualified fire control watch — maintain a tactically correct solution, support the watch officer's firing decision process, brief the watch relief accurately at turnover.
    Technical accuracy in the control room is not enough — the watch officer also needs to trust your communication. When the solution is solid, brief it with confidence and the data supporting it. When the solution has uncertainty — track correlation issues, ambiguous contact data, a solution that has been running long without an update — brief that too, explicitly, before the watch officer asks. The FT3 who proactively communicates solution confidence gives the watch officer what he needs; the one who waits to be asked is the one who gets asked in the debrief instead.
  2. 02
    Perform torpedo tube preventive maintenance to the applicable technical manual — outer door and breech door mechanisms, tube pressurization, interlocks, and hydraulics — log the action in 3-M without a QA writeback.
    Read the Maintenance Requirement Card before arriving at the evolution, not during it. The MRC specifies the procedure, the tools required, and the acceptance criteria; arriving with the MRC memorized and the tools staged means the evolution runs to the technical manual standard, not to memory. The 3-M entry closes with the actual findings documented — not 'satisfactory' if there was a finding that was corrected, but 'found X, corrected per procedure, rechecked per step Y, satisfactory after correction.'
  3. 03
    Troubleshoot a fire control system fault to the component level using the applicable technical manual fault-isolation procedure.
    Resist the substitution instinct — do not swap a component because it seems like the likely failure before running the fault-isolation procedure. The FCS technical manuals include structured diagnostic trees that isolate faults systematically; following the procedure is faster and more reliable than intuition for everything except the most obvious failures. Document the fault-isolation steps in the 3-M corrective action entry so the next technician understands what was checked and what was found.
  4. 04
    Train a FTSN through a submarine qualification section or fire control PQS line item as a qualified task demonstrator.
    A task demonstrator sign-off requires that you personally witnessed the FTSN demonstrate the knowledge or skill in the qualification standard. 'Walked them through it and they seemed to understand' is not a demonstration. Ask the FTSN to explain the system or procedure back to you as if you have never seen it; ask what happens if this valve is in the wrong position, or what this indicator means when the system is in a degraded mode. Sign when the answer meets the standard, not when the conversation is complete.
  5. 05
    Maintain weapons-handling certification currency and participate in torpedo load/offload and tube maintenance evolutions as a trained team member.
    Weapons-handling certification is not one-time; it requires currency maintenance through participation in evolutions and periodic training. Keep a personal log of what evolutions you have participated in and when your certifications are due for renewal — do not rely entirely on the LPO's tracking system. The FT3 who shows up to a torpedo load knowing the procedure cold and having reviewed the safety brief that morning is the team member the team lead positions at the critical station.

Manuals & References — What Chapters Matter

  • Fire control system technical manuals for the installed FCS on your hull (MK 117 or current-generation system — verify with division officer)
    At FT3, the fault-isolation section of the FCS technical manual becomes your primary diagnostic tool. Knowing the architecture well enough to trace a fault from symptom to component without looking up the first step is the capability that separates the FT3 who the LPO relies on from the one who needs supervision for every corrective action.
  • Applicable torpedo technical manuals (MK 48 ADCAP series or current variant)
    The MK 48 ADCAP is the weapon you are supporting tactically and maintaining mechanically. The handling, stowage, and safety requirement sections of the applicable technical manual are the foundation for every torpedo load/offload and tube maintenance evolution you participate in. Know the applicable safety interlocks and the specific hazards of the weapon you are working around.
  • NAVSEA OD 45845 (or current equivalent) — Submarine Weapons and Ordnance System Safety Manual
    At FT3, you are a certified team member on weapons-handling evolutions — not an observer. The safety governance for those evolutions lives in this document. Knowing the safety requirements means you can recognize when a procedure is being done wrong and call a hold without waiting for the team leader to notice.
  • NWAE Bibliography for Advancement (BIB) for FT2 — pull from MyNavyHR/NETC for the current cycle
    The BIB is the NWAE test material. Build a study plan with the LCPO's input on timeline; use the Electronic Advancement Workbook to track completion. FT3s who finish the BIB ninety days before the NWAE window and spend the final thirty days on practice questions consistently outperform those who start the BIB sixty days before the exam.
  • COMSUBFOR / SUBLANT / SUBPAC operational instructions on fire control system readiness and reporting
    You are producing data — through maintenance logs and watch-standing reports — that feeds the boat's FCS readiness brief. Understanding the standards the boat is measured against at the operational level gives context to why the specific maintenance thresholds and qualification currency requirements matter.

Standards — How to Hit Each

  • NWAE for FT2 prep on the LCPO's timeline — the FT3 who walks into the exam cold watches the advancement slate from the maintenance bench.
    Pull the current BIB as soon as the new NWAE cycle is announced. Build a weekly study schedule — a minimum of five hours per week, allocated across the BIB subject areas proportional to the weight each carries on the exam. The LCPO should see a study log, not just hear that you are studying.
  • Advanced fire control watch qualification in progress beyond the initial certification.
    Identify the advanced fire control watch positions in your division's qualification progression path and begin building toward the next one immediately after the first is earned. The FT3 who holds only the minimum qualification tier when the FT2 slate is discussed is not performing at rate in the chief's evaluation language.
  • Zero maintenance log writebacks on personally signed corrective-action entries over a patrol or evaluation cycle.
    Before signing a corrective-action entry, read it as if you are the QA reviewer checking it a month later. Is the action documented specific enough that someone with no context could reconstruct what was found, what was done, and what the outcome was? If not, rewrite the entry before signing it.

Technical Mistakes — Concrete Consequences

  • Standing a fire control watch with a solution that has drifted and not flagging it to the watch officer.
    The watch officer makes tactical decisions based on the solution the FT3 is maintaining. A degraded solution presented without flagging its limitations leads to a post-exercise debrief that the weapons officer leads and the FT3 sits through while the department head takes notes. One occurrence of this is a counseling; a pattern of it is a watch-qualification review.
  • Closing a tube maintenance log entry with an action description that does not match what was actually done.
    Your initials on the entry mean you verified the work. If a SIB or a command inspection QA reviewer finds that the entry reads 'checked and serviced' and the tube system has a finding that the entry should have identified, the FT3 who signed it is the first call the weapons officer makes.
  • Attempting a fire control system repair outside your qualification level without a qualified FT present.
    Unauthorized modifications to a fire control system are a certification compliance issue that is investigated at command level. The investigation does not stop at 'nothing bad happened' — it identifies what procedure was bypassed, who was present, and why supervision was not present. The FT3 who took the initiative to fix something outside their qualification level ends up in the weapons officer's office with the LPO and the LCPO watching.
  • Discussing the boat's patrol schedule, operating area, or weapons loadout with anyone not on the boat.
    An OPSEC incident in the submarine community triggers a command investigation that the CO briefs to the squadron commander. The outcome depends on what was disclosed and to whom, but clearance suspension pending investigation is automatic and loss of the submarine qualification is a realistic outcome for a serious breach.

Career Decisions at This Rank

  • Pursue re-enlistment and commit to the submarine FT path through the senior petty officer tiers.
    The first re-enlistment window typically opens around the four-year mark for sailors who enlisted on standard contracts. For an FT3 who has Dolphins, fire control watch qualifications, and a solid NWAE history, re-enlistment into the submarine force is the path to FT2 and FT1 — the ranks where the real fire control technical authority and leadership responsibility begin. The selective re-enlistment bonus (SRB) for submarine-qualified FTs varies by cycle and zone; verify the current NAVADMIN for rate and zone before the career counselor conversation. If you are uncertain about re-enlisting, the honest version of that uncertainty is worth surfacing with the career counselor before the bonus window closes.
  • Pursue an advanced NEC or school opportunity at FT3.
    Certain NEC codes in the FT rate require formal school attendance that opens at the petty officer level. The specific schools and NEC pathways vary with system upgrades and force requirements; your career counselor and the NAVADMIN for the current cycle are the authoritative sources. FT3s who earn advanced NECs early build the qualification record that positions them for the most competitive FT2 and FT1 billets in the fleet — the fire control technical authority roles that the weapons officer calls by name rather than by rate.
  • Begin positioning for LDO/CWO commissioning program or STA-21 if the inclination is there.
    FT3 is not the application window for commissioning programs, but it is when the record starts to matter. The LDO/CWO programs for submarine weapons-focused candidates reward exactly the profile an FT3 builds: Dolphins, fire control qualifications, strong evaluations, demonstrated technical depth. If the commissioning path is a consideration, talk to your chief now about what the record needs to look like at FT1 or CPOFT to make the application competitive — and build toward it from FT3 forward rather than discovering what you should have done two patrols ago.

How the Seat Varies by Unit Type

  • Fast-attack submarine (SSN — Los Angeles or Virginia class)
    The typical FT3 assignment. Small crew, small fire control division, high operational tempo. On a fast-attack, the FT3 is a known quantity to the entire weapons department from week one. The qualification pace is fast; the operational pace is fast. Fast-attacks support a broad range of missions, and the FT3 who builds technical depth on the FCS is used accordingly.
  • Ballistic missile submarine (SSBN — Ohio class)
    The boomer FT3 experience differs from fast-attack in pace and mission profile. The blue/gold crew rotation means regular turnover of the other half of your crew; the operational schedule is more predictable. The FCS on an SSBN is oriented toward the strategic deterrence mission — the qualification profile and the operational expectations are distinct from the attack submarine world.
  • Submarine Squadron (SUBRON) training billet
    Rare at FT3, but some FT3s are assigned to squadron-level training commands or schoolhouses. These billets provide breadth across the fire control systems on multiple hull types and can build a broader technical foundation than a single-boat assignment — but they also delay patrol experience and qualification depth that the boat-assignment FT3 builds faster.

What Good Looks Like at This Rank

The good FT3 is the petty officer the division officer trusts at the fire control panel during a real-world exercise because the solution is current, the brief to the watch officer at turnover is accurate, and the torpedo tube status at the firing panel matches the maintenance log. He does not wait for the watch officer to ask whether the solution is solid — he briefs the confidence level as part of the normal watch turnover. In the torpedo room, his MRCs close clean. The QA reviewer who pulls a random sample of his 3-M entries finds entries that describe what was found and what was done in language specific enough to reconstruct the evolution without asking the FT3 to explain it verbally. There are no writebacks on his entries over the patrol. His FTSN has a qualification section progressing on schedule, and when you ask the FTSN what the FT3 taught them, the answer includes the why — not just the procedure, but the reason the procedure exists and the failure mode it prevents. His NWAE study log is on the chief's tickler, the BIB subject areas are being checked off on a schedule, and the LPO is already mentioning his name in the context of the next advanced fire control watch qualification track.

Preview — The Next Rank

At FT2 (E-5), the title 'working senior fire control technician on the boat' becomes literal. The chief and the division officer use the FT2 as the technical lead for the fire control section — the person who owns complex fault isolation, who owns the section's weapons readiness input to the daily brief, and who the FT3s escalate problems to before going to the chief. The watch position responsibility increases; the FT2 is expected to stand the senior fire control watchstander position during exercises and real-world operations. The leadership responsibility increases sharply at FT2. Writing the corrective-action entries that FT3s operate under, training FT3s through advanced qualifications, and running weapons-handling evolutions as a team lead are all FT2-level expectations. The FT3 who has been an active task demonstrator, who has run weapons evolutions as a certified team member, and who has consistently produced clean 3-M entries is positioned to step into the FT2 role immediately; the one who did the minimum at FT3 will spend the first six months of FT2 catching up. The Chief packet conversation also starts becoming concrete at FT2. The LCPO who is worth following will start talking about the chief board at the FT2 level — not to pressure, but to give enough lead time to build the record deliberately. The FT2 who arrives at FT1 with a blank-slate chief packet is behind; the FT2 who arrives with a documented history of leadership outcomes, advanced qualifications, and commissioning-program mentorship is competitive.
FAQ

FT E4 — Frequently Asked Questions

Q01What does a E4 FT (Fire Control Technician) actually do?
You stand qualified fire control watches in the control room, execute preventive and corrective maintenance on the fire control system and torpedo tube machinery, and begin building the deeper technical knowledge that separates a good FT3 from one who just qualified the minimum.
Q02What's the most important thing to know as a E4 FT?
FT3 (E-4) with Dolphins on your chest is the first rank where you stand a productive fire control watch.
Q03What does a typical day look like for a E4 FT?
Time-blocked day at the E4 FT rank tier: 0530 Wake, shower, muster. If standing watch that day, the watch rotation dictates the entire schedule — the port-and-starboard or three-section watch bill replaces the standard upkeep day structure when underway, 0600–0630 Morning quarters on the pier or on deck in port. The LCPO uses quarters to assign the day's maintenance priorities and announce any qualification sign-off opportunities, 0630–0800 Physical training — PRT components and unit fitness. Submarine schedules in port typically block PT before maintenance to ensure it happens; underway,…
Q04What mistakes get E4 FT soldiers fired or relieved?
Presenting a stale or unconfident fire control solution to the watch officer without flagging its limitations. The watch officer depends on the FT3 to maintain an accurate tactical picture and to communicate uncertainty — a watch officer making an employment decision on a solution the FT3 knew was degraded is a post-exercise debrief that ends careers;…
Q05What career decisions matter most at the E4 FT rank tier?
Pursue re-enlistment and commit to the submarine FT path through the senior petty officer tiers — The first re-enlistment window typically opens around the four-year mark for sailors who enlisted on standard contracts. For an FT3 who has Dolphins, fire control watch qualifications, and a solid NWAE history, re-enlistment into the submarine force is the path to FT2 and FT1 — the ranks where the real fire control technical authority and leadership responsibility begin. The selective re-enlistment bonus (SRB) for submarine-qualified FTs varies by cycle and zone;…
Q06What's next after E4 for a FT (Fire Control Technician) in the Navy?
At FT2 (E-5), the title 'working senior fire control technician on the boat' becomes literal.
Q07What manuals and regulations does a E4 FT need to know cold?
Fire control system technical manuals for the installed FCS on your hull (MK 117 or current-generation system — verify with your division officer and pull the applicable manual volumes before quoting system specifications): the documents your maintenance and watch-standing are executed against.; Applicable torpedo technical manuals (MK 48 ADCAP series or current variant): the weapon you are supporting tactically and maintaining mechanically; know the handling, stowage,…

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Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards