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USNHT

Hull Maintenance Technician

Performs shipboard welding, brazing, plumbing, and sheet metal fabrication. Maintains hull integrity, piping systems, and structural components aboard Navy vessels. One of the core engineering rates aboard surface ships.

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Recruiter vs. Reality
What they tell you

Hull Maintenance Technicians are the welders, plumbers, and metalworkers who keep Navy ships structurally sound. Every pipe, every weld, every patch on the hull is your work. The trade skills — welding certifications, pipefitting, sheet metal — transfer directly to civilian shipyards, construction, and industrial maintenance.

What it's actually like

You weld in spaces that are too hot, too small, and too awkward for the job. Shipboard welding is nothing like a shop environment — you're working overhead, in bilges, in confined spaces that require a safety watch. The plumbing side means you own every pipe system on the ship, including the CHT (sewage) system, which is exactly as unpleasant as it sounds when it breaks. The welding certifications (AWS) are genuinely valuable and the civilian demand for certified welders is strong. Shipyard work, industrial maintenance, and union pipe trades all recruit from this rate.

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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.

E1-E3SR — HTFN (Apprentice Hull Maintenance Technician)

You are the new HT — the one who gets the grinding wheel and the chipping hammer while the second class watches to see if you take pride in the work or just the paycheck.

What You Actually Do

Fresh out of HT "A" School at Great Lakes, you check aboard and land in a damage-control (DC) locker, a hull-maintenance shop, or a repair division on a surface combatant or tender. Your first months are metal prep, bilge inspection, and learning the difference between a plated-repair weld and a tack that will crack underway. You chip, grind, and chip again; you lubricate pipe fittings, stroke through firefighting drill stations, and log 3-M maintenance requirement cards (MRC cards) for the HT2s who sign them. Welding qualification starts with GTAW (TIG) and SMAW (stick) wire on flat plate, progressing to position welds as the senior HTs decide you are ready. Damage control is not a drill rotation — it is the other half of the job, and the DC PQS line items you close now determine which watchbill you stand when the ship deploys.

Key Skills to Drill
  • 01Strike an arc and lay a sound SMAW weld in the 1G flat position to NSTM Chapter 074 and AWS D1.1 visual-inspection criteria — no cracks, no porosity, no undercut that a second-class keeps correcting.
  • 02Read a basic pipe-system diagram (P&ID) and trace flow paths in the bilge, firemain, and ballast systems before you open a valve or cut a flange.
  • 03Execute a PMS MRC card completely — preparation, safety checks, work steps, log entry, LPO sign-off — no skipped steps, no back-dated entries.
  • 04Run a damage-control repair-locker inventory: shore-FM plugs, wedges, clamps, blanks, torque wrenches, pipe-patching kits — everything to SOP and logged.
  • 05Stand a basic damage-control watchstation (repair locker phone-talker, DC roving watch) and report status by the SORM format without the watch supervisor prompting.
  • 06Handle SMAW electrodes, shielding gases, and grinding debris per the safety requirements in NSTM Chapter 074 — PPE, ventilation, fire watch posted before arc is struck.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. The HT bible for weld procedure, inspection criteria, welder qualification, and fire-safety requirements. Know the qualification tables before your first weld test.
  • NAVSEA S9086-CH-STM-010 — Structural Welding and Brazing (Hull Structures volume). The procedure-specific companion to NSTM 074 for hull and structural work.
  • AWS D1.1 — Structural Welding Code – Steel. The commercial standard NAVSEA procedures reference; your WPS (Weld Procedure Specification) lives inside it.
  • OPNAVINST 4790.4 series — Ships' 3-M Systems Procedures Manual. Every MRC card you log and every maintenance action you sign for runs inside this program.
  • NAVPERS 18068 Vol II — Manual of Navy Enlisted Manpower and Personnel Classifications. Pull the HT-rate NEC entries so the C-school and specialty-path conversation is not a surprise.
  • OPNAVINST 6110.1 — Navy Physical Readiness Program. Your PRT and BCA standard from check-in; the HT shop notices who falls out of shipboard DC drill sprints.
Standards You Must Hit
  • Basic welder qualification (1G flat position, SMAW) to NSTM 074 criteria signed by the ship's Welding Inspector before the first underway. Showing up to a deployment weld-unqualified is not a plan.
  • DC-locker PQS and basic repair-locker watchstander qualification on the LCPO's timeline — the HT who is still unqualified at six months is visible to the DCA.
  • PRT Good Low or higher; BCA in standard. Damage-control drill hose runs and repair-locker accountability drills are physical events; the first class notices who can sprint to the casualty.
  • NWAE study habit started for HT3 — pull the current NETC Bibliography for Advancement (BIB) and own it before the eligibility window closes faster than you expect.
  • Zero 3-M documentation errors attributed to skipped steps or back-dated log entries — one falsified MRC during a TYCOM spot-check opens a page-11 minimum.
Common Technical Mistakes
  • Striking an arc on ship structure without a Hotwork Permit in hand and a fire watch posted. One weld in an uncontrolled space and the chief is in the DCA's office before the arc goes cold.
  • Opening or closing a valve from memory instead of tracing the line-up on the P&ID. One wrong valve in the ballast or firemain system sequences a flooding casualty.
  • Logging a weld as complete and within visual criteria when it has undercut or porosity you hoped would not be noticed. The Welding Inspector reads the weld with a flashlight, not your intent.
  • Skipping a MRC step because the machine "always passes." The INSURV inspector's 3-M spot-check finds the skipped step and the entire division fails the audit because of one card.
  • Treating damage-control drills as administratively annoying. The ship's damage-control posture is a readiness assessment, and the HT who cannot find the repair locker under blue lighting at 0200 is a liability.
What Good Looks Like

The good HTFN is the apprentice the second class sends alone to the repair locker and the inventory comes back correct. By month eight the basic welder qual is signed, the DC PQS is closed, and the LCPO is scheduling the position-weld test instead of asking why the line items are still blank.

Go Deeper at E1-E3
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full E1-E3 Playbook →
E4HT3 (Petty Officer Third Class)

You are a petty officer now. The crow means you own a watchstation, a section of the 3-M schedule, and at least one HTFN who is watching how you hold a stinger.

What You Actually Do

You stand as a qualified DC petty officer on the watchbill and as a working HT in the hull-maintenance or repair division. The full weld position progression is real now — 1G, 2G, 3G, 4G, overhead — and the ship's Welding Inspector is the arbiter, not your preference. You execute structural repairs, pipe-flange replacements, and tank inspections under the first class's direction; you train HTFNs on PQS line items and sign your name to their progress. If you are on a tender, you are doing production-level repair work on other ships — the standards are NSTM 074, NAVSEA S9086, and the applicable military specifications, not whatever looks close enough. The "C" school conversation gets real: advanced welding (NEC 4604 or equivalent), pipe and valve NEC pipelines, or the dive-school track for underwater ship-husbandry if you tested for it before A-school. Pull the current NAVADMIN for HT advancement quotas and NEC source-ratings before you fall in love with a path.

Key Skills to Drill
  • 01Qualify in at least two weld positions beyond 1G — NSTM 074 / AWS D1.1 standard — and pass the ship's Welding Inspector's visual and bend-test on the first attempt.
  • 02Perform a pipe-flange replacement or hull-penetration repair from tagout through system restoration: P&ID trace, isolation, cut and fit, weld, NDE (visual / dye penetrant), test, and log.
  • 03Stand a DC repair-locker watch as petty officer of the locker — accountability, equipment readiness, phone-talker control — and run the drill assignment without the chief walking you through it.
  • 04Conduct a topside hull inspection and log findings against NAVSEA S9086-CH-STM-010 criteria: coating condition, wastage, deformations, weep holes — report with compartment numbers, not verbal summaries.
  • 05Execute a full Hotwork Permit evolution as the initiator: hazardous-atmosphere test, fire watch posted, permit completed and signed, watch maintained, post-work inspection logged.
  • 06Mentor an HTFN through five-to-eight PQS line items as the signature authority — your name is on the standard.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. You teach it now, you do not just follow it — know the welder qualification tables, WPS requirements, and NDE acceptance criteria.
  • NAVSEA S9086-CH-STM-010 — Hull Structures (Welding/Brazing). The procedure reference for structural repair on the hull you are maintaining.
  • AWS D1.1 — Structural Welding Code – Steel. The commercial code your NAVSEA procedures reference; know what CJP (complete joint penetration) and PJP (partial joint penetration) mean before your next Inspector conversation.
  • OPNAVINST 4790.4 series — 3-M Systems; own the MRC library for your assigned work centers and know the difference between scheduled and corrective maintenance entries.
  • NAVPERS 18068 Vol II — NEC catalog; read the entries for HT NEC codes (advanced welding, pipe, valve, diving support) before you talk to the career counselor.
  • NWAE Bibliography for Advancement (BIB) for HT2 cycle — current; pull from MyNavyHR/NETC; the BIB is the test, the test is the BIB.
Standards You Must Hit
  • NWAE for HT2 prep on the LCPO's timeline — the HT3 who walks into the exam cold is the one watching the advancement slate from the bench.
  • Full position-weld qualification battery (1G through 4G, SMAW; 1G/2G GTAW at minimum) documented in the ship's welder-qualification record before the next INSURV.
  • PRT Good Medium or better; BCA in standard. Tender and afloat repair work is physically demanding; the division chief notices who can work overhead for two hours and who taps out.
  • Zero Hotwork Permit violations attributed to your evolutions — a permit bypass is a summary court-martial territory on a Navy ship, and the DCA does not distinguish intent from result.
  • NEC pipeline packet in motion or documented reason it is still building — the HT3 without a specialty track is the one passed over when C-school slots hit the board.
Common Technical Mistakes
  • Exceeding the scope of a WPS (Weld Procedure Specification) to "make it fit." Welding outside the approved procedure invalidates the weld, requires NDE re-inspection, and puts your name in the Welding Inspector's discrepancy log.
  • Performing a system repair without completing the tagout package. One re-energized line or premature valve opening in an active system is an injury, a JAGMAN, and a career event for the petty officer whose name is on the work order.
  • Calling a weld "visual-pass" when you can see the defect but hope it will hold. NAVSEA S9086 and NSTM 074 have acceptance criteria in print — the Inspector does not grade on a curve and the structural failure is not theoretical.
  • Treating the DC drill as a separate job from the welding job. The DCA runs the whole repair division; the HT3 who cannot perform either function under pressure is a liability in both spaces.
  • Going around the LPO to the DCA with a work-authorization disagreement. The repair chain runs through the first class; the DCA hears it either way, and which path you took is part of every eEVAL conversation that follows.
What Good Looks Like

The good HT3 is the petty officer the first class sends to a tight topside-repair job alone and the P&ID trace is right, the Hotwork Permit is filled out before the first arc strikes, and the post-weld visual comes back clean. His HTFN's PQS is advancing; his NWAE study log is on the LCPO's desk without asking; the NEC conversation has already started.

Go Deeper at E4
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full E4 Playbook →
E5HT2 (Petty Officer Second Class)

You are the working senior HT — the one the LPO sends to the job that requires a qualified welder and a petty officer at the same time. The section runs off your standard, not your intentions.

What You Actually Do

You run a work-center team or section under the first class — structural repair, pipe and valve, DC equipment maintenance, tank inspection, or the tender production shop if you are on a repair ship. You train and qual-sign HT3s and HTFNs, manage your section's 3-M MRC compliance and CSMP (Current Ship's Maintenance Project) input, and execute or supervise the complex jobs the LCPO won't send a second class to do unsupervised — overhead hull repairs, penetration refits, firemain system replacements, ballast-tank structural work. NEC-coded billets define the specialty: NEC 4604 (advanced welding), pipe/valve NEC track, or the underwater ship-husbandry diver path for the HT2s who made it through NDS (Navy Diver School, Panama City FL). The AWS Certified Welding Inspector (CWI) exam path is on the horizon for the senior second class building civilian transferability — it is real, it is achievable, and it opens doors the Navy rate alone does not.

Key Skills to Drill
  • 01Supervise a structural-repair or pipe-replacement evolution as the senior HT on the job: P&ID line-up verified, tagout complete, WPS selected, fire watch posted, work executed, NDE accepted, system restored — without the first class standing at your elbow.
  • 02Run the section's 3-M PMS compliance and CSMP work-order input, defend the section's due-date posture at division sync, and hand the brief to the LPO with no surprises.
  • 03Conduct a full damage-control readiness inspection of a repair locker or DC equipment space: equipment serviceability, stowage to SOP, consumable counts, weigh-in dates on AFFF and extinguishers — logged and reported to the DCA.
  • 04Qualify and hold a repair-locker DC petty officer watchstation and serve as the repair-locker LPO during routine-hours operations.
  • 05Mentor an HT3's NEC / weld-qualification progression from idea to selection, signing the training documentation as the senior — your signature is the standard.
  • 06Write the section's input to the repair division's engineering readiness brief — PMS completion, CSMP work orders, personnel qual currency — clean enough that the LCPO presents it without alteration.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. You supervise weld jobs against these criteria; know the qualification tables, WPS families, and NDE acceptance criteria cold.
  • NAVSEA S9086-CH-STM-010 — Hull Structures. You sign structural-repair write-ups that reference this manual — know the chapters, not just the cover.
  • NAVSEA OD 45845 — Damage Control. The platform-agnostic DC reference that governs your locker operations, flooding response procedures, and equipment inspection requirements.
  • AWS D1.1 — Structural Welding Code – Steel. Know the difference between prequalified and qualified WPS, and what your Welding Inspector is measuring against when the bend test comes back.
  • OPNAVINST 4790.4 series — 3-M / PMS policy; you own the section's PMS compliance posture and defend it at the TYCOM 3M spot-check.
  • NWAE Bibliography for Advancement (BIB) for HT1 cycle — current; build a study plan with milestones, not a stack of PDFs.
Standards You Must Hit
  • NWAE for HT1 prep documented on the LCPO's timeline; EAW (Enlisted Advancement Worksheet) clean; BIB study log defensible in a conversation with the chief.
  • NEC awarded or in-pipeline (NEC 4604 advanced welding, pipe/valve, or diver-track documentation in motion) — the HT2 without a specialty is visible at the next ranking board.
  • PRT Good High or better; BCA in standard; Surface Warfare (SW) device pinned where the billet allows and kept current.
  • Section PMS completion rates at or above command average every cycle — the DCA reads the 3-M spot-check printout, not your verbal summary.
  • eEVAL trait average and ranking that supports EP/MP recommendation; your LCPO knows your number before the EVAL board sees it.
Common Technical Mistakes
  • Letting an HT3 execute a weld repair without verifying the WPS selection. Your sign-off as section supervisor is the production-quality record; if the Inspector rejects the weld, the repair log cites the supervisor, not the welder.
  • Signing off a Hotwork Permit evolution without personally verifying the fire-watch post and the hazardous-atmosphere test. One permit shortcut and the JAGMAN opens with your name as initiator.
  • Calling a tank inspection "complete" after a light scan from the access hatch. NAVSEA S9086 structural-inspection criteria require contact inspection of the plating — the IG inspector and the INSURV team inspect differently than a phone-talker review.
  • Treating the AWS CWI study investment as something to do after you make E-6. The CWI exam is open at E-5 with the right weld-experience hours documented — HTs who start that log early close the exam clock faster.
  • Bypassing the LCPO to go directly to the DCA with a maintenance-authorization dispute. The DCA hears it either way, and which path you chose is part of every eEVAL and Chief-board conversation that follows.
What Good Looks Like

The good HT2 is the petty officer the LPO sends on the complex penetration refit while the chief is at department-head sync — and the job comes back with the P&ID trace documented, the weld visual clean, the system tested, and the 3-M entry logged before the LPO asks. His section's PMS numbers brief without caveats; his HT3 has a NEC packet moving; his eEVAL bullets read action-result-impact.

Go Deeper at E5
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full E5 Playbook →
E6HT1 (Petty Officer First Class)

You are the LPO. The DCA briefs the wardroom off your numbers, the chief is building your anchor package, and the HT2s and HT3s watch how you own the repair division the way you used to watch your LPO.

What You Actually Do

You are LPO of the repair division — Hull Division (R-Division), Damage Control Division on a large-deck, or the welding / pipefitting production shop on a tender. You run 8-20 HTs, write four-to-six eEVALs per cycle that drive the next NWAE and advancement slate, build and defend the division's 3-M and CSMP posture at department-head sync, manage the Hotwork Permit program and all weld-procedure compliance at the LPO level, and mentor at least one HT per year toward a NEC school, the AWS CWI exam, or the MECP / Seaman-to-Admiral commissioning path if they qualify. The Chief board conversation is no longer future-tense — your LCPO is building the package and the Welding Inspector certification on your record and the DCA qualification on your watch card both matter for the next selection board. Making Chief is the milestone. The division runs the way you set it.

Key Skills to Drill
  • 01Run a division-level 3-M PMS and CSMP program — MRC compliance, work-order tracking, overdue reporting, TYCOM 3M spot-check readiness — and brief the DCA monthly with no line items the DCA has not already heard from you.
  • 02Manage the ship's Hotwork Permit program as the LPO-level administrator: permit issuance discipline, fire-watch accountability, post-work inspection logging, and zero permit-bypass incidents on your watch.
  • 03Qualify and hold the Repair Locker Petty Officer in Charge watchstation and serve as the senior repair-locker voice during General Quarters drills and real casualties.
  • 04Defend the division's engineering readiness brief to the DCA, XO, and INSURV representative — 3-M completion, CSMP work-order status, weld-qual currency, NDE inspection posture — without the wardroom rewriting the numbers.
  • 05Mentor an HT2's NWAE / NEC / AWS CWI / commissioning packet from idea to selection — and counsel honestly when the path is wrong for the sailor.
  • 06Write an eEVAL block the senior rater can defend at a wardroom ranking board — measurable accomplishments, named outcomes, the language the Chief selection board actually reads.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. Full familiarity; you are the LPO the DCA comes to with the procedure question before calling the technical authority.
  • NAVSEA S9086-CH-STM-010 — Hull Structures. You sign production-level repair documentation that references this manual at the LPO level.
  • NAVSEA OD 45845 — Damage Control. You run the repair locker off this reference; you are the LCPO the DCA expects to know it cold during a CART/DEAST assessment.
  • AWS D1.1 — Structural Welding Code – Steel. You oversee weld-procedure qualification, WPS selection, and welder-performance-qualification record maintenance for the division.
  • OPNAVINST 4790.4 series — 3-M / PMS policy; you own the division's PMS compliance posture and you defend it at the TYCOM 3M spot-check.
  • NAVPERS 18068 Vol II + current NEC source-rating NAVADMIN — build the pipeline off the current message, not last cycle's.
Standards You Must Hit
  • Chief board packet under construction with the LCPO's eye on every line; eEVAL profile defensible at wardroom and command level; SW warfare device pinned and current.
  • Division 3-M PMS completion rates and CSMP input defensible at DCA / XO / INSURV level every cycle, no caveats.
  • Hotwork Permit program clean — zero permit-bypass incidents on your watch; permit log auditable at any TYCOM or INSURV inspection.
  • Weld-qualification records current for every HT in the division — qualification expiration tracked, renewal scheduled, no expired welder standing on the production floor.
  • Pipeline output producing at least one NEC / CWI / commissioning selectee per year from the division.
Common Technical Mistakes
  • Briefing 3-M or CSMP numbers you have not personally validated. The DCA catches it once and the Chief packet carries the mark permanently.
  • Letting an HT2 carry the Hotwork Permit issuance accountability because "he is reliable." When he transfers mid-deployment, the permit chain breaks and the next fire watch is running on institutional memory.
  • Treating the AWS CWI exam track as a nice-to-have. On a tender or afloat repair platform, the HT1 LPO with a current CWI credential is the one NAVSEA quotes in ship-repair contracts; it differentiates your Chief package in a way eEVAL blocks cannot.
  • Going around the LCPO to the DCA or the XO with a work-authorization dispute. The DCA and the wardroom both talk; which path you chose is part of every Chief-board conversation after.
  • Treating the commissioning and NEC mentoring as transactional. The HTs you develop at this rank build the surface force's afloat-repair bench for the next decade — counsel honestly about ADSO, seat selection, and the life the path actually requires.
What Good Looks Like

The good HT1 is the LPO the DCA trusts to run the repair division for a week without daily check-ins. His 3-M brief never has a finding the DCA has not already heard from him; his eEVALs move HT2s; his NEC and CWI pipeline produces at least one selectee per year. He sits the Chief selection board with a record that reads itself and a Hotwork Permit program the INSURV team finds clean without a single corrective comment.

Go Deeper at E6
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full E6 Playbook →
E7HTC (Chief Petty Officer)

You are a Chief. The gold-fouled anchors change the seat more than any promotion — the wardroom talks to you by name, the deckplate sets its damage-control standard off how you walk the repair locker at 0600.

What You Actually Do

As LCPO of a repair or DC division — R-Division on a DDG, CG, or LHD; the hull and mechanical section on a tender; or the DC department LCPO on a large-deck where the seat exists — you run 15-40 HTs and you own enlisted hull-maintenance execution from deckplate to watchbill. You write Chief-quality eEVALs that drive the HT1 and HTC slate; you sit at department-head sync as the senior enlisted repair voice; you walk the spaces during a TYCOM CART / DEAST visit or INSURV and identify broken systems before the inspector does. You build the next LPO. You mentor the next NEC / CWI / commissioning candidate. You enforce the NSTM 074 and NAVSEA S9086 standard, in uniform, every day, while the deckplate watches whether you still know how to read a weld.

Key Skills to Drill
  • 01Run an LCPO's bench of HTs — accountability, training, watchbill, advancement, discipline, family readiness — with weekly cadence the DCA and the department head can predict.
  • 02Defend the division's 3-M PMS completion, CSMP status, Hotwork Permit program health, weld-qual currency, and NDE inspection posture at command-level sync without numbers being rewritten by the wardroom.
  • 03Walk a real-world engineering casualty, TYCOM CART / DEAST visit, or INSURV hull and damage-control inspection as the senior enlisted repair voice on the deckplate — your post-inspection AAR is what the DCA briefs up.
  • 04Mentor four-to-six HT1s toward Chief-board-competitive packages; mentor at least one NEC / CWI / commissioning packet to selection per year.
  • 05Operate as the senior enlisted damage-control authority during a deployment or surge cycle — including the call to wake the DCA at 0200 when the hull or DC posture has actually changed.
  • 06Translate NAVSEA / TYCOM / INSURV damage-control and hull-maintenance strategy into deckplate decisions the HTs rehearse without rewording the message.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. Full library familiarity; you are the chief the DCA calls with the procedure question before calling NAVSEA technical authority.
  • NAVSEA S9086-CH-STM-010 — Hull Structures. You are accountable for production-level structural repairs; the INSURV inspector quotes this manual directly at your spaces.
  • NAVSEA OD 45845 — Damage Control. Your repair lockers are maintained against this reference; you brief the DCA on DC equipment readiness from it.
  • OPNAVINST 4790.4 series — 3-M / PMS policy. You are accountable for the division's entire PMS posture at every TYCOM inspection.
  • MILPERSMAN — fluent in the articles governing enlisted personnel actions (advancement, retention, separation, NJP) at Chief-level visibility.
  • CPO 365 / CPO Initiation guidance — the wardroom and the goat locker hold you to it after the anchors go on, and the HT division watches whether it changed how you act.
Standards You Must Hit
  • CPO Academy / Chief's Mess transition complete; functioning as a Chief on the deckplate every day, not only in the mess.
  • Division 3-M PMS completion, CSMP input, weld-qual currency, and Hotwork Permit program defensible at DCA / XO / INSURV level every cycle.
  • eEVAL profile and ranking that selects HT1s and HTCs from your division on schedule — measured by who actually advances.
  • Pipeline producing 1+ NEC / CWI / commissioning selectee per year; the wardroom can name them.
  • Zero Chief-level integrity incidents — Hotwork Permit bypass, 3-M falsification, financial, fraternization. One ends the career permanently.
Common Technical Mistakes
  • Mistaking the goat locker for a break room. The mess is a working leadership platform; chiefs who disappear after quarters are the ones the deckplate reads as off-mission, and the DCA notices next.
  • Stopping personal physical fitness because "I am a Chief now." DC drill sprints and overhead repair work are physical events; the deckplate reads the standard the anchor sets.
  • Letting an HT1 LPO run the division with stale weld-qualification records because "he has the production numbers." The INSURV inspector's welder-qualification spot-check finds it under your name, not his.
  • Going public with disagreement with the DCA or the XO. Take it into the passageway, then the office; walk out aligned. The goat locker enforces this without the wardroom asking.
  • Treating the CWI / NEC / commissioning mentoring as a checkbox. The HTs you develop at this rank build the surface force's afloat-repair bench for the next decade — counsel honestly about which path is right for which sailor.
What Good Looks Like

The good Chief Hull Maintenance Technician is the LCPO the DCA names when the XO asks who the senior repair chief is by name. His division's 3-M brief never has a finding the DCA has not already heard from him; his HT1s pick up Chief on the expected timeline; his NEC and CWI pipeline produces above-average rates. He is on the Senior Chief slate before the CMC has to suggest it.

Go Deeper at E7
Time-blocked daily schedule, unit-type variations, career decisions, full reading list with chapters — written for the soldier in this seat.
Full E7 Playbook →
E8-E9HTCS — HTCM (Senior/Master Chief)

You are the senior enlisted hull-maintenance voice in a department, command, or staff. The DCA briefs you, not the other way around, on what the deckplate actually thinks about the ship's repair posture.

What You Actually Do

As HTCS or HTCM you run the senior enlisted hull-maintenance and damage-control posture for a large-deck ship's engineering or repair department (department LCPO on an LHD, CVN, or tender), a fleet maintenance and modernization command staff, a NAVSEA surface ship maintenance regional maintenance center (RMC), or sit as Command Master Chief (CMC) where the path opens. You write fewer eEVALs but they are the ones that pick the next Chief and Senior Chief slate. You sit at command-team sync as the senior enlisted voice on every enlisted hull-maintenance and DC decision — accession, training, retention, weld-procedure credentialing, and discipline. You translate NAVSEA / TYCOM / INSURV hull-maintenance and damage-control strategy into command-level talent decisions. You build the next CMC / SEA selectee. You start the post-Navy plan 24-36 months out — credentialing translation (AWS CWI if not already earned, NACE Coating Inspector, NBPI Pipe Inspector, federal civil-service route at NAVSEA or RMC), civilian shipyard or marine-industrial hiring, or defense contractor — because the bench you leave behind decides whether the next HTCM is shaped in your image.

Key Skills to Drill
  • 01Run a senior-enlisted hull-maintenance and damage-control climate across a department or command that produces qualified watchstanders, NEC selectees, and CWI / commissioning accessions at rates above the type-command average.
  • 02Brief the CO, DCA, TYCOM, or NAVSEA technical authority on enlisted hull-maintenance and damage-control readiness in language the commodore can defend at the next echelon without rewriting.
  • 03Sit on Chief selection board panels, command CMC slates, and weld-credentialing panels with the discipline and confidentiality the convening authority requires.
  • 04Translate NAVSEA / TYCOM / INSURV hull-maintenance and DC program strategy into enlisted talent management decisions at the unit and across the rate.
  • 05Run a real-world hull-casualty response, CART / DEAST / INSURV DC and structural inspection, or shipyard planning availability as the senior enlisted hull-maintenance voice — your lessons-learned is what NAVSEA reads in the post-visit report.
  • 06Run a casualty notification with the dignity it requires. You are the face the family sees.
Manuals & References
  • NSTM Chapter 074 — Welding and Allied Processes. Full library; you are quoted from it more often than you quote it — the Chief who still looks up the basic qualification table does not carry the same weight in the repair spaces.
  • NAVSEA S9086-CH-STM-010 — Hull Structures. You are accountable for the command's production-level structural-repair standards; the INSURV team cites this manual against your program.
  • NAVSEA OD 45845 — Damage Control. Your DC program is maintained and inspected against this reference; the DCA briefs its compliance to the TYCOM under your name.
  • MILPERSMAN — fluent on enlisted personnel actions at the senior-enlisted threshold; you are in the room for NJP, separation, and high-visibility cases.
  • Senior Enlisted Academy (SEA, Naval War College Newport RI) reading list and CPO/CMC Symposium materials — you consume doctrine and translate it down.
  • NAVSEA, TYCOM, and INSURV policy memos / NAVADMINs — current; pull each one as it drops, not from a stale network share.
Standards You Must Hit
  • Senior Enlisted Academy fellowship or equivalent senior-enlisted PME complete before competing for command CMC slate.
  • Command-level hull and damage-control inspection (TYCOM CART, DEAST, INSURV) passed without senior-enlisted-attributable findings during your tenure.
  • NEC and CWI / commissioning pipeline producing 1+ selectee per year from your command, and the wardroom can name them.
  • eEVAL profile that the senior rater can defend at command and TYCOM level — your rated chiefs are advancing to Senior Chief and Master Chief on schedule.
  • Zero senior-enlisted-level integrity incidents — Hotwork Permit bypass, 3-M falsification, financial, fraternization, OPSEC. One ends the career permanently and there is no recovery at this paygrade.
Common Technical Mistakes
  • Pretending to be the senior technical voice on a weld-procedure or structural-engineering topic where you are out of date. Senior HTs lose authority by faking depth — the DCA and the NAVSEA technical rep see it inside the same brief.
  • Letting a Chief-led division drift on weld-qualification records or Hotwork Permit accountability because "the wardroom will catch it." You own the enlisted hull-maintenance execution at the command roll-up; the INSURV inspector finds it under your name.
  • Treating the AWS CWI / NEC / commissioning mentoring as a checkbox. The HTs you develop at HTCM build the surface force's afloat-repair bench NAVSEA depends on for the next decade.
  • Going public with disagreement with the DCA, the XO, or the commodore. Take it in the office; walk out aligned. The goat locker and the wardroom both enforce it.
  • Confusing the approach to retirement with the job. Until you walk off the quarterdeck for the last time, the quarterdeck is the job, and the deckplate reads which one you are working.
What Good Looks Like

The good Master Chief Hull Maintenance Technician is the senior enlisted repair voice the CO, DCA, and TYCOM all name without thinking. His command's hull-maintenance and DC program is the one NAVSEA and INSURV cite in post-visit lessons-learned; his NEC and CWI accession rate is in the upper third of the rate; his rated chiefs advance to Senior Chief and Master Chief on schedule. When he walks off the quarterdeck for the last time, the repair lockers are still running the standard he set — which is the only measure that matters, and the one the next HTCM will be judged against.

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FAQ

HT Hull Maintenance Technician — FAQ

Q01What does a HT do in the Navy?
Fresh out of HT "A" School at Great Lakes, you check aboard and land in a damage-control (DC) locker, a hull-maintenance shop, or a repair division on a surface combatant or tender.
Q02How long is HT training and where is it held?
HT training is approximately 10 weeks of Advanced Individual Training (AIT) after Basic Combat Training, held at Great Lakes, IL.
Q03What does a day in the life of a HT look like?
A typical junior-enlisted HT day: 0500 Wake up. PT uniform on. Quick check — nothing on your phone from the duty section about a casualty overnight, 0530 PT formation on the pier or in the ship's hangar bay. Take accountability for yourself, report to the leading petty officer. Missing accountability is a chain-of-command event before 0545, 0545-0700 Unit PT — run, circuit, or swim depending on the week's training plan. HTs are expected to keep up during DC drill sprints;…
Q04What are the most common career-ending mistakes for a HT?
Striking an arc without a Hotwork Permit and fire watch in place. One weld in an uncontrolled space and the DCA knows your name before the arc goes cold — and not in a career-positive way; Back-dating or skipping MRC steps on a 3-M card. The TYCOM 3-M spot-check inspector does not grade on completion rate; he audits signatures, dates, and step compliance. One falsified card opens a page-11 minimum;…
Q05What's the career progression for a HT?
RTC Great Lakes — Navy boot camp, ~8-10 weeks; HT 'A' School, NETC Great Lakes — welding fundamentals, pipe theory, DC basics, 3-M orientation; First assignment: R-Division on a surface combatant, tender production shop, or IMA
Q06What's the recruiter not telling me about HT?
You weld in spaces that are too hot, too small, and too awkward for the job.
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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