NCCER Maritime key terms

A wearable device such as a life jacket or work vest that keeps a person's head above water. It must fit properly and be inspected before each shift on or near the water.

An emergency in which a person falls from a vessel or dock into the water. Response includes shouting the alert, throwing flotation, marking the position, and recovering the person quickly.

A practiced emergency exercise where the crew rehearses alerting, throwing flotation, maneuvering, and recovering a person from the water. Regular drills build the speed and coordination that real rescues demand.

A designated gathering point where crew assemble during an emergency or drill so they can be counted and given instructions. Its location is posted and covered in the vessel's orientation.

A written set of procedures telling workers what to do, where to go, and whom to notify during fires, spills, injuries, or other emergencies. It is reviewed during onboarding and drills.

The system of labels, safety data sheets, and training that informs workers about chemical hazards. It covers fuels, solvents, paints, and cleaners common in maritime work environments.

A standardized document describing a chemical's hazards, safe handling, protective equipment, first aid, and spill response. Workers must be able to locate the SDS for every hazardous product they use.

Gear worn to reduce injury risk, including hard hats, safety glasses, gloves, hearing protection, and steel-toe boots. Selection depends on the task and the hazards identified in the job analysis.

A procedure for isolating and securing energy sources before maintenance so equipment cannot start unexpectedly. Each worker applies a personal lock and tag, and only the person who applied it removes it.

Entering an enclosed area such as a tank, hold, or void with limited access and poor ventilation. It requires testing the atmosphere, a permit, an attendant, and a rescue plan before anyone goes in.

Systems and practices that prevent workers from falling from heights, such as guardrails, harnesses, lanyards, and anchor points. Maritime work often involves scaffolds, decks, and vessel structures above water.

A short, focused safety meeting held before a shift or task to review hazards, procedures, and assignments. It gives crew a chance to raise concerns and confirm they understand the plan.

A step-by-step review of a task that identifies hazards and the controls needed at each stage. It is completed before work begins and updated when conditions or procedures change.

The right and responsibility of any worker to halt a task when they see an unsafe condition or behavior. It protects workers from retaliation and is a core part of a strong safety culture.

An unplanned event that did not cause injury or damage but could have. Reporting near misses lets crews correct hazards before a serious incident occurs.

The skills of tying, coiling, and securing ropes used for mooring, towing, and rigging. Knowing common knots and safe line handling prevents slippage, snapback injuries, and equipment loss.

The system of ropes, cables, slings, shackles, and hardware used to lift and secure loads. Riggers select and inspect gear, calculate load limits, and control the load during lifts.

Standard gestures used by a signalperson to direct crane operators when voice or radio communication is unreliable. Everyone on the lift must recognize the signals and know who is authorized to give them.

A manufacturer's table showing the maximum safe load a crane or lifting device can handle at various radii and configurations. Operators must stay within its limits for every lift.

Securing a vessel to a dock, buoy, or another vessel using lines and hardware. Safe mooring accounts for tides, current, and line tension to prevent parting lines and drift.

The vertical distance from the waterline to the lowest point of a vessel's hull. Crew use draft to judge clearance in shallow water and to plan loading and ballast.

Weight carried in tanks or holds to improve a vessel's stability and trim. Ballast is adjusted as cargo is loaded or unloaded to keep the vessel safe and level.

A vessel's ability to return to an upright position after being tilted by waves, wind, or shifting loads. It depends on weight distribution, hull shape, and the height of the center of gravity.

Joining or separating metal using heat, often with electric arcs or gas flames. In maritime work these tasks require fire watch, ventilation, and protection of nearby combustible materials.

A written authorization required before welding, cutting, grinding, or other spark-producing tasks. It confirms fire precautions, a fire watch, and safe conditions are in place.

Paints and protective finishes applied to hulls, decks, and structures to resist corrosion and fouling. Surface preparation and application conditions strongly affect how long a coating lasts.

The gradual breakdown of metal caused by chemical reactions with water, salt, and oxygen. Maritime crews prevent it through coatings, cathodic protection, and regular inspection.

Scheduled inspection, lubrication, and repair of equipment to prevent breakdowns and extend service life. It is tracked on logs and completed before small problems become costly failures.

A document authorizing and describing a specific maintenance or repair task, including materials, labor, and priority. Work orders track progress and feed into cost and schedule reporting.

Time when equipment or a crew cannot work because of breakdowns, weather, or waiting. Reducing downtime through planning and maintenance directly improves productivity.

The longest sequence of dependent tasks in a project schedule that determines the earliest completion date. Delays on the critical path delay the entire project.

The amount of useful work completed per unit of time, labor, or cost. Crews track productivity to spot delays, adjust staffing, and compare planned versus actual progress.

Organizing and positioning materials and tools near the work area before a task begins. Good staging reduces travel time, prevents lost materials, and keeps walkways clear.

Keeping work areas clean, organized, and free of debris, spills, and clutter. It prevents slips, fires, and lost tools and is a daily responsibility for every worker.

Assigning a task to another person with the authority and resources needed to complete it. Effective delegation matches the task to the person's skills and sets clear expectations.

The number of workers a supervisor directly manages. A span that is too wide reduces oversight and communication, while one too narrow can slow decisions and waste resources.

The formal line of authority from senior leadership down through supervisors to individual workers. Clear reporting lines prevent confusion about who makes decisions and who receives reports.

A structured conversation in which a supervisor and worker discuss results, strengths, and areas for improvement. Reviews should be specific, documented, and tied to clear goals.

A structured training program combining paid on-the-job experience with related classroom instruction. Apprentices progress through skill levels and earn credentials recognized by the industry.

A worker who has completed an apprenticeship or equivalent training and is qualified to perform trade work independently. Journeymen often mentor apprentices and take on more complex tasks.