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newSchoolWorks.com › VoTechWorks › Manufacturing & Marine › Shipbuilding / Marine Fabrication › Externship / Worksite Placement › Lesson 2
MFG-SHIP13-08 · Lesson 2 · 160 clock hours · field

Production Fitting and Welding: Supervised Task Rotations

Objective. Students perform assigned production tasks in at least three of the five trade areas — hull fitting, structural welding, outfitting, plate preparation, or marine coatings — to employer quality standards while maintaining uninterrupted daily logs.

Production Fitting and Welding: Supervised Task Rotations

Your externship placement puts you on an active production floor or shipyard where real vessels are built to real schedules. Every task you perform during these rotations contributes to a finished hull, a structural assembly, or a coated surface that must meet employer quality standards and, ultimately, classification-society requirements. This lesson explains what is expected of you across your trade-area rotations, how to document your work, and how to keep yourself and your coworkers safe while producing at a professional level.

What Task Rotations Mean in Practice

You are required to work in at least three of the five production areas: hull fitting, structural welding, outfitting, plate preparation, or marine coatings. Each area demands different tools, different hazards, and a different standard of judgment. Rotating through multiple areas is not busywork — shipyard employers value workers who understand how one trade feeds the next. A fitter who understands weld distortion sets up joints more accurately. A welder who has done surface prep knows why coating adhesion depends on cleanliness.

In each area your assigned journeyman supervisor directs, observes, and signs off on your work. Their initials in your daily log are your proof of participation and quality. Treat every entry as a legal record: legible date, task name, method used, and supervisor signature. Gaps in the log signal absences or unsupervised work and will trigger a coordinator review.

Hull Fitting and Structural Welding

In the fitting rotation you may tack frames to keel assemblies, scribe and cut bracket blanks, or align bulkhead stiffeners. Use your plumb bob and spirit level to verify plumb before any tack weld is placed — a frame that is out of plumb by even a small amount transfers dimensional error to every subsequent component. A combination square checks 90-degree corners on brackets; a chalk line transfers reference lines across large plates. Never assume a plate is square because it was plasma-cut; always verify.

In the welding rotation the process — SMAW, FCAW, GMAW, or GTAW — is assigned by your employer based on the joint configuration and production requirements, not your preference. Each week, photograph at least one representative weld and attach the print to your log. Then perform a written self-assessment using AWS D1.1 visual acceptance criteria for steel joints or AWS D1.2 criteria for aluminum. Check weld profile (convexity and concavity limits), undercut depth at the toe, porosity count and diameter, and arc strikes outside the weld zone. Your supervisor reads your self-assessment and either confirms it or corrects it in writing. The point is to train your eye to the same standard an AWS inspector uses.

Non-Welding Rotations: Coatings, Outfitting, and Template-Making

You must complete a minimum of 24 hours in at least one non-welding production area. Marine coatings surface preparation typically involves power-tool cleaning — needle scaling, grinding, and wire brushing — to reach a specified surface profile before primer is applied. Outfitting rough-in may include routing pipe hangers, pulling cable trays, or installing HVAC foundations. Template-making for structural components requires you to transfer compound curves from the vessel's lines to cardboard or thin sheet stock that fabricators use as cutting guides.

For each rotation, write a one-page reflection describing the process, safety controls in place, tools handled, and how the work connects to NCCER Outfitting or Shipfitting module content you studied in class. These reflections demonstrate professional transfer of learning — the ability to link classroom theory to production reality.

Safety Controls That Are Non-Negotiable

Personal protective equipment is matched to the hazard. For welding, wear a helmet rated for the amperage and process in use; auto-darkening lenses must shade appropriately for the arc. Leather gloves protect against spatter and hot metal. Grinding and chipping require a face shield worn over safety glasses — the face shield alone is not eye protection.

Respiratory protection depends on the task. Grinding coated steel, working near paint operations, or using flux-cored wire in confined areas may require a half-face respirator with appropriate cartridges. Confirm the cartridge type with your supervisor before entering the space. Never rely on a dust mask for metal fume or solvent vapor.

Lockout/tagout (LOTO) applies any time you service or clear a jam on any powered equipment. Verify the equipment is de-energized and locks are applied before reaching into any moving-part area. On a shipyard, overhead cranes, hydraulic presses, and rotating positioners all require coordinated LOTO procedures — follow your employer's written program exactly.

Housekeeping and hot-work awareness prevent fires. Keep your work area clear of combustibles within the radius specified by your employer's hot-work permit. After welding or grinding, remain in the area for the fire-watch period required by your employer's policy before leaving.

Mid-Term Evaluation and the Improvement Plan

At approximately 160 cumulative externship hours your employer completes a formal mid-term evaluation scoring you across workmanship, safety, communication, and attendance on a 100-point scale. A score of 70 or above means you continue on your current path. A score below 70 triggers a written improvement plan with specific, measurable benchmarks. Your program coordinator contacts you within five business days to schedule a check-in. The improvement plan is a tool, not a punishment — it identifies exactly what needs to change and gives you a documented path to get there before the final evaluation.

Connecting Your Work to Credentials

Every production task you log maps to NCCER Shipfitting or NCCER Maritime Welding task areas tracked in the NCCER Registry. Your weld photos and self-assessments build the documented evidence base for AWS D1.1 and D1.2 Certified Welder performance. Work performed on ABS-classed vessels or to USCG inspection standards gives you direct exposure to the ABS/USCG weld qualification process. The daily log is therefore not just a program requirement — it is the earliest version of the craft portfolio that will follow you throughout your career.

Key terms9

Daily Production LogA written record completed each externship day that documents tasks performed, methods used, and the supervising journeyman's initials confirming quality; serves as the official record of hours and competency for credential purposes.
AWS D1.1 Visual Acceptance CriteriaThe set of visual inspection standards found in the AWS D1.1 Structural Welding Code — Steel that define acceptable limits for weld profile, undercut, porosity, and surface discontinuities on steel welds.
AWS D1.2The American Welding Society's Structural Welding Code for Aluminum, which establishes welding procedures, welder qualification requirements, and visual and nondestructive examination acceptance criteria specific to aluminum structures.
Trade-Area RotationA scheduled period during which an externship student works in a specific production department — hull fitting, structural welding, outfitting, plate preparation, or marine coatings — to develop cross-functional understanding of shipbuilding production.
Lockout/Tagout (LOTO)An OSHA-required safety procedure in which energy sources to equipment are isolated and physically locked in the off position before any servicing, clearing, or maintenance work is performed, preventing unexpected re-energization.
Weld Self-AssessmentA student-completed written evaluation of a representative weld sample measured against the applicable AWS visual acceptance criteria; the supervising journeyman confirms or corrects the assessment in writing to develop inspection skill.
Mid-Term Employer EvaluationA formal scored review conducted by the employer at approximately 160 cumulative externship hours, rating the student on workmanship, safety, communication, and attendance on a 100-point scale to identify progress or needed improvement.
Surface ProfileThe anchor-tooth roughness created on a metal surface by abrasive blasting or power-tool cleaning, measured in mils; the specified surface profile must be achieved before primer or coating is applied to ensure proper adhesion.
Improvement PlanA written document issued when a student scores below the minimum threshold on a mid-term evaluation, specifying measurable performance benchmarks the student must meet, with a coordinator check-in scheduled within five business days.

Worked examples4

1. You are self-assessing a fillet weld on a 3/8-inch steel bracket. AWS D1.1 states the maximum undercut depth for a statically loaded member is 1/32 inch (0.8 mm). You measure the undercut at the weld toe with a fillet weld gauge and read 0.045 inch. Does the weld pass or fail the visual criterion?
  1. Step 1 — Identify the acceptance limit: AWS D1.1 permits a maximum undercut depth of 1/32 inch, which equals 0.03125 inch.
  2. Step 2 — Compare the measured value to the limit: 0.045 inch measured vs. 0.03125 inch allowed.
  3. Step 3 — Determine result: 0.045 inch exceeds 0.03125 inch, so the undercut is deeper than the code allows.
Answer: The weld fails the AWS D1.1 visual acceptance criterion for undercut. You must note the failure in your self-assessment, describe the exact measurement, and allow your supervisor to confirm the finding in writing. The joint will require repair — grinding out the undercut and re-welding — before it can be accepted.
2. You need to verify that a bulkhead stiffener is plumb before tacking. You hang a plumb bob from the top flange. The string touches the bottom flange at a point 3/16 inch toward the ship's centerline from the flange face. The stiffener is 72 inches tall. Is this within a typical ±1/8-inch plumb tolerance and by how much does it deviate?
  1. Step 1 — State the measured offset: the plumb bob indicates the bottom is 3/16 inch (0.1875 inch) out of plumb relative to the top over 72 inches of height.
  2. Step 2 — State the tolerance: a common production tolerance for stiffener plumb is ±1/8 inch (0.125 inch) over the member height — confirm the exact tolerance from your employer's fitting specification before proceeding.
  3. Step 3 — Compare: 0.1875 inch measured deviation vs. 0.125 inch allowed.
  4. Step 4 — Calculate how far out: 0.1875 − 0.125 = 0.0625 inch beyond the tolerance limit.
Answer: The stiffener is out of tolerance by 0.0625 inch (1/16 inch). Do not tack it in this position. Notify your journeyman supervisor. The stiffener must be shifted toward the outboard side until the plumb bob reads within ±1/8 inch before tacking is permitted.
3. You are logging your coatings rotation hours. You have completed 8 hours on Monday, 6 hours on Tuesday, and 5 hours on Wednesday in the coatings prep area. The program requires a minimum of 24 hours in a non-welding rotation. How many more hours do you need in this rotation?
  1. Step 1 — Total hours completed so far: 8 + 6 + 5 = 19 hours.
  2. Step 2 — Subtract from the minimum requirement: 24 − 19 = 5 hours remaining.
Answer: You need 5 more hours in the coatings (or another non-welding) rotation to meet the 24-hour minimum. Plan those hours with your journeyman supervisor and record them in your daily log before moving on.
4. Your mid-term evaluation scores are: Workmanship 18/25, Safety 22/25, Communication 16/25, Attendance 20/25. What is your total score out of 100, and does it meet the 70-point threshold?
  1. Step 1 — Add all category scores: 18 + 22 + 16 + 20 = 76.
  2. Step 2 — Compare to the threshold: 76 out of 100 vs. the required minimum of 70.
Answer: Your total score is 76 out of 100, which exceeds the 70-point threshold. You continue on your current externship path without an improvement plan. However, Communication at 16/25 is your lowest area — discuss targeted strategies with your supervisor to strengthen it before the final evaluation.

The math in this lesson2

Learners total evaluation scores out of 100 and compare them to the pass threshold.
7.RP.3N-Q.1
Brush up in the math halls at newSchoolWorks.com:
In class: Under direct journeyman supervision, execute assigned fitting tasks such as tacking frames to keel assemblies, scribing and cutting bracket blanks, or aligning bulkhead stiffeners using plumb bobs, levels, and combination squares; supervisor initials the daily log after each observed task to confirm the work met production quality — NCCER Shipfitting credential areas: structural assembly, layout, and fitting. · Perform SMAW, FCAW, GMAW, or GTAW welds as assigned by the employer (process determined by production needs and student qualification level); student photographs representative weld samples weekly, attaches photos to the log, and self-assesses against AWS D1.1 visual acceptance criteria (weld profile, undercut, porosity) or AWS D1.2 for aluminum joints; supervisor confirms or corrects the self-assessment in writing. · Rotate through at least one non-welding production area (marine coatings surface prep, pipe or electrical outfitting rough-in, or template-making for structural components) for a minimum of 24 hours; student writes a one-page reflection per rotation describing the process, safety controls used, tools handled, and how the work connects to NCCER Outfitting or Shipfitting module content.
Materials: Employer-issued production tools and PPE (welding helmet rated for process in use, leather gloves, face shield, respirator appropriate to coating or grinding task), combination square, chalk line, plumb bob, grinder, chipping hammer, wire brush, measuring tape, digital camera or smartphone for weld photos, daily log binder, AWS D1.1 and D1.2 visual inspection criteria reference card, NCCER task-area checklist.
Check: Supervisor initials present on daily log for each observed production task; minimum of three trade-area rotations documented with photos or reflections; mid-term employer evaluation (completed at approximately 160 cumulative hours) scores student at 70 or above out of 100 across workmanship, safety, communication, and attendance — students scoring below 70 receive a written improvement plan with specific measurable benchmarks and a coordinator check-in within five business days.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Safety — Hot-Work and Fire Prevention
1. You finish a welding task and need to leave the area. According to standard hot-work safety practice, what must you do before walking away?
AWS D1.2 Aluminum Credential
2. Which AWS code provides the visual inspection acceptance criteria for welded aluminum structural joints?
NCCER Shipfitting — Externship Documentation
3. A student's daily log is missing supervisor initials for three consecutive days. What is the most likely consequence during the coordinator's review?
AWS D1.1 Certified Welder
4. During a fillet weld self-assessment, you find a single pore on the weld face that is 3/32 inch in diameter. Which reference document tells you whether this pore is acceptable?
Safety — PPE and Respiratory Protection
5. You are assigned to a marine coatings surface-prep rotation where workers are power-tool cleaning painted steel with needle scalers and grinders. Which respiratory protection is most appropriate?
NCCER Shipfitting — Externship Requirements
6. A student completes 8 hours in marine coatings on Monday and 9 hours on Tuesday in the same area. How many additional hours are still needed to meet the 24-hour minimum non-welding rotation requirement?
Safety — Lockout/Tagout
7. Before servicing a jammed conveyor roller on a plate-handling line, which safety procedure must be completed first?
NCCER Maritime Welding — Externship Evaluation
8. A student's mid-term evaluation scores are: Workmanship 15/25, Safety 20/25, Communication 17/25, Attendance 14/25. What happens next according to program policy?
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