Deck Operations Watchkeeping and Seamanship Tasks (AB Pathway) / Engine-Room Rounds and Machinery Monitoring (QMED Pathway) — Maritime Crew (deck/engine)

Objective. Students will perform assigned watch duties—lookout, helm, mooring line handling, and deck maintenance for the AB pathway, or engine-room rounds, log readings, fuel and oil transfers, and auxiliary machinery checks for the QMED pathway—consistently meeting the quality and safety standards set by the supervising credentialed mariner across a minimum of 21 documented shifts.

Your Placement: Where Classroom Meets the Vessel

Your externship is the core of your training. Over a minimum of 21 documented shifts—each at least three hours long—you will work alongside credentialed mariners on a real vessel, carrying out the duties of either an Able Seaman (AB) or a Qualified Member of the Engine Department (QMED). Everything you practiced in the lab now has weight and consequence. Pay attention, stay safe, and document everything.

AB Pathway: Deck Watchkeeping Duties

As a watchstander on deck, your four core duties are lookout, helm, mooring line handling, and deck maintenance.

Lookout means scanning continuously—eyes moving, binoculars ready—and reporting every vessel, light, sound signal, obstruction, or person in the water to the officer of the watch (OOW) immediately. Never assume the OOW has already seen something. Your verbal report is your job; acting on it is theirs.

Helm means steering the ordered course and responding promptly to helm commands. Acknowledge every order aloud before you execute it, and report when the order is complete. If the steering gear behaves abnormally—sluggish response, unusual noise, or unexpected movement—notify the OOW without delay.

Mooring line handling requires you to know which line is which (bow line, stern line, spring lines, breast lines), how to take a turn on a bitts, and when to surge or let go under the mate's direction. Never place your body between a line under tension and any fixed object. Stand clear of bights. Wear your personal flotation device (PFD) and non-slip footwear whenever you are working near the rail.

Deck maintenance includes chipping, painting, greasing, splicing, and general upkeep. Use the correct PPE for each task: safety glasses and gloves for chipping; respirator and gloves when painting; hearing protection near loud machinery. Inspect every hand tool before use. A damaged marlinspike or paint scraper should be removed from service and reported.

QMED Pathway: Engine-Room Rounds and Machinery Monitoring

QMED watchstanders are responsible for keeping the machinery plant operating safely and within limits. Your duties include engine-room rounds, log readings, fuel and oil transfers, and auxiliary machinery checks.

Engine-room rounds are systematic walks through the space at intervals directed by the engineer officer. You check for unusual sounds, vibration, heat, smoke, or leaks—oil, water, fuel, or steam. Any abnormality is reported to the watch engineer immediately. Never delay a safety report because you are unsure whether it matters.

Log readings capture temperatures, pressures, levels, and running hours for the main engine, generators, boilers, pumps, and other systems. Read gauges at eye level to avoid parallax error. Record values legibly in the engineering log using the units shown on the instrument. If a reading is outside the normal operating range posted by the vessel, report it before moving on.

Fuel and oil transfers must follow the vessel's oil transfer procedure and the Oil Pollution Act requirements. Before any transfer: verify the receiving tank has capacity, confirm all valves are correctly lined up, post the required warning notice, and have spill containment in place. Never leave a transfer unattended. At the end of the transfer, close all valves, record volumes transferred and beginning/ending tank soundings in the oil record book as directed by the engineer officer.

Auxiliary machinery checks cover fire pumps, bilge pumps, air compressors, heat exchangers, and similar equipment. Before working on or near rotating machinery, confirm that lockout/tagout (LOTO) procedures have been applied if the task requires it. LOTO isolates energy sources—electrical, hydraulic, steam, or mechanical—so the equipment cannot start unexpectedly. Only a qualified person may remove a lockout device.

Logging Every Shift

Your sea-service logbook is a legal document that supports your USCG credential application. At the end of every shift, record: date, vessel name, watch hours, tasks performed, equipment used, and any safety events or drills. Entries must be legible and complete. Your supervisor will sign each entry. A missing or unsigned entry may not count toward your sea service.

Emergency Drills

During the placement you will participate in at least two drills—fire, man-overboard (MOB), or abandon-ship. Know your muster station before the drill is called. When the alarm sounds, move promptly, wear the required equipment (PFD, immersion suit if directed), and fulfill your assigned role. After the drill, record the drill type, date, your assigned role, and what you did in your logbook.

Mid-Placement Review

Around shifts 10 and 11, your supervisor will give you a verbal performance review. Listen carefully, ask clarifying questions if needed, and record the feedback and any corrective actions you will take. The Employer Competency Rubric scores you weekly on safety behavior, task performance, and communication on a scale of 1 to 4. You must average 3 or higher across all three categories with no category scored 1 at any weekly review. Use the mid-placement review as your opportunity to correct course before final evaluation.

Safety Principles That Apply Every Day

Report hazards immediately—do not wait to see if a problem resolves itself.
Wear the right PPE for the task—PFD at the rail, hearing protection near high-noise equipment, eye protection when chipping or grinding.
Follow LOTO before working on any isolated system.
Never work on a bight of line under tension.
Know your emergency muster station and duties before you need them.

Key terms10

Officer of the Watch (OOW)The licensed officer responsible for the safe navigation and operation of the vessel during a given watch period; the person to whom deck watchstanders report.

Sea-Service LogbookA personal record kept by the mariner documenting dates, vessel names, watch hours, tasks performed, and safety events; required to document qualifying sea service for USCG credential applications.

LookoutA watchkeeping duty requiring continuous visual and auditory observation of the surrounding waters and reporting of all contacts, hazards, or persons in the water to the OOW.

Lockout/Tagout (LOTO)An energy-isolation procedure that applies physical locks and warning tags to machinery or electrical circuits so equipment cannot be started or energized while maintenance or inspection is underway.

Engineering LogThe official record of machinery plant readings—temperatures, pressures, running hours, fuel consumption, and alarms—maintained by engine-room watchstanders and signed by the watch engineer.

BightA loop or slack section of a mooring line or rope; standing inside a bight is extremely dangerous because a sudden load on the line can trap or injure a person.

Muster StationThe designated location where crew members must assemble when an emergency alarm is sounded; each crew member has a specific role at their muster station defined by the vessel's muster list.

Employer Competency RubricThe program's standardized evaluation form used by the supervising mariner to score student performance on safety behavior, task performance, and communication on a weekly basis during the externship.

Oil Record BookA required vessel document in which all fuel and oil transfers, bilge discharges, and related operations are recorded to comply with US and international pollution-prevention regulations.

Parallax ErrorA reading error that occurs when a gauge is viewed from an angle rather than straight on, causing the pointer to appear at a value different from the actual measurement.

In class: Complete each assigned watch or work period (minimum 3 hours per shift) under direct supervision, carrying out tasks as directed, reporting any observed hazards immediately to the watch officer or engineer, and recording task details, equipment used, and any safety events in the logbook at the end of each shift. · Participate in at least two emergency drills (fire, man-overboard, or abandon-ship) scheduled by the host employer during the placement period, fulfilling the assigned muster role and documenting the drill type, date, and personal actions taken in the logbook. · Receive a mid-placement verbal performance review from the supervisor at approximately the halfway point (around shift 10–11); address any areas of concern identified, adjust performance accordingly, and note the feedback and corrective actions taken in the logbook.
Materials: Student sea-service logbook, employer watchkeeping assignment sheet, appropriate hand tools (marlinspike, paint scraper, grease gun, or engine-room toolkit as assigned), relevant vessel stability or machinery operating manuals available on site, USCG AB or QMED credential checklist for reference
Check: Supervisor rates each week of work using the program's Employer Competency Rubric (scale of 1–4 per category); pass standard is an average score of 3 or higher across safety behavior, task performance, and communication by the end of lesson 2, with no category rated 1 at any weekly review.

Practice check8

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