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Material moving machine operators use machinery to transport various objects. Some operators move construction materials around building sites or earth around a mine. Others move goods around a warehouse or onto and off of container ships.

Material moving machine operators typically do the following:

• Control equipment with levers, wheels, or foot pedals
• Move material according to a plan or schedule they receive from their superiors
• Set up and inspect material moving equipment
• Make minor repairs to their equipment
• Record the material they have moved and where they moved it from and to

In warehouse environments, most material moving machine operators use forklifts and conveyor belts. Automated sensors and tags are increasingly used to keep track of merchandise, allowing operators to work faster.

In warehouses, operators usually work closely with hand material movers. For more information, see the profile on hand laborers and material movers.

Many operators work for underground and surface mining companies. They help to dig or expose the mine, remove the earth and rock, and extract the ore and other mined materials.

In construction, material movers remove earth to clear space for buildings. Some work on a building site for the entire length of the construction project. For example, material moving machine operators often help to construct high-rise buildings by transporting materials to workers far above ground level.

The following are types of material moving machine operators:

Industrial truck and tractor operators drive trucks and tractors that move materials around warehouses, storage yards, or worksites. These trucks, often called forklifts, have a lifting mechanism and forks, which makes them useful for moving heavy and large objects. Some industrial truck and tractor operators drive tractors that pull trailers loaded with material around factories or storage areas.

Excavating and loading machine and dragline operators use machines equipped with scoops or shovels. They dig sand, earth, or other materials and load them onto conveyors for transport elsewhere. Most of these operators work in construction or mining industries.

Dredge operators excavate waterways. They remove sand, gravel, or rock from harbors or lakes to help prevent erosion and improve trade. Removing these materials helps maintain navigable waterways and allows larger ships to use more ports. Dredging is also used to help restore wetlands and maintain beaches.

Underground mining loading machine operators load coal, ore, and other rocks onto shuttles, mine cars, or conveyors for transport from a mine to the surface. These workers generally work underground in mines. They may use power shovels, hoisting engines equipped with scrapers or scoops, and automatic gathering arms that move materials onto a conveyor.

Crane and tower operators use tower and cable equipment to lift and move materials, machinery, or other heavy objects. Operators extend and retract horizontal arms and lower and raise hooks attached to cables at the end of their crane or tower. Operators are usually guided by other workers on the ground using hand signals or a radio. Most crane and tower operators work at construction sites or major ports, where they load and unload cargo. Some also work in iron and steel mills. 

Hoist and winch operators, also called derrick operators or hydraulic boom operators, control the movement of platforms, cables, and cages that transport workers or materials for industrial operations, such as constructing a high-rise building. Many of these operators raise platforms up far above the ground. Most work in manufacturing or construction industries. For more information about rig derrick equipment workers, see the profile on oil and gas workers.

Conveyor operators and tenders control conveyor systems that move materials on an automatic belt. They move materials to and from places such as building sites, storage areas, and vehicles.

Transportation, Storage, and Distribution Managers plan, direct, or coordinate transportation, storage, or distribution activities in accordance with organizational policies and applicable government laws or regulations. Includes logistics managers.

Marine engineers and naval architects design, build, and maintain ships from aircraft carriers to submarines, from sailboats to tankers. Marine engineers work on the mechanical systems, such as propulsion and steering. Naval architects work on the basic design, including the form and stability of hulls.

Marine engineers typically do the following:

• Prepare system layouts and detailed drawings and schematics
• Inspect marine equipment and machinery to draw up work requests and job specifications
• Conduct environmental, operational, or performance tests on marine machinery and equipment
• Design and oversee testing, installation, and repair of marine apparatus and equipment
• Investigate and observe tests on machinery and equipment for compliance with standards
• Coordinate activities with regulatory bodies to ensure that repairs and alterations are done safely and at minimal cost
• Prepare technical reports for use by engineers, managers, or sales personnel
• Prepare cost estimates, schedules for design and construction, and contract specifications
• Maintain contact with contractors to be sure the work is being done correctly, on schedule, and within budget

The people who operate or supervise the operation of the machinery on a ship are sometimes called marine engineers, or, more frequently, ship engineers. Their work differs from that of the marine engineers in this profile. For more information on ship engineers, see the profile on water transportation occupations.

Marine engineers are increasingly putting their knowledge to work in power generation. Companies that formerly concentrated on other activities, such as papermaking, are now increasing their efforts to produce and sell electricity back to the power grid. These engineers' skills are also useful in the oil and gas industry, including offshore drilling operations.

Naval architects typically do the following:

• Study design proposals and specifications to establish basic characteristics of a ship, such as size, weight, and speed
• Develop sectional and waterline curves of the hull to establish the center of gravity, ideal hull form, and data on buoyancy and stability
• Design entire ship hulls and superstructures, following safety standards
• Design the layout of ships' interiors, including passenger compartments, cargo space, ladder wells, and elevators
• Confer with marine engineers to set up the layout of boiler room equipment, heating and ventilation systems, refrigeration equipment, and propulsion machinery
• Lead teams from a variety of specialties to oversee building and testing prototypes
• Evaluate how the ship does during trials both at the dock and at sea and change the design as needed to make sure the ship meets national and international standards.

Workers in water transportation occupations operate and maintain ships that take cargo and people over water. These ships travel to and from foreign ports across the ocean, to domestic ports along the coasts, across the Great Lakes, and along the country's many inland waterways.

Water transportation workers typically do the following:

• Operate and maintain private ships
• Follow their ship's strict chain of command
• Ensure the safety of all people and cargo on board

These workers, sometimes called merchant mariners, work on a variety of ships.

Some operate large deep-sea container ships to transport manufactured goods around the world.

Others work on bulk carriers that move heavy commodities, such as coal or steel across the oceans and over the Great Lakes.

Still others work on both large and small tankers that carry oil and other liquid products around the country and the world. Others work on supply ships that transport equipment and supplies to offshore oil and gas platforms.

Workers on tugboats help barges and other boats maneuver in small harbors and at sea.

Salvage vessels that offer emergency services also employ merchant mariners.

Cruise ships employ a large number of water transportation workers, and some merchant mariners work on ferries to transport passengers along shorter distances.

A typical deep sea merchant ship, large coastal ship, or Great Lakes merchant ship employs a captain and chief engineer, along with three mates, three assistant engineers, and a number of sailors and marine oilers. Smaller vessels that operate in harbors or rivers may have a smaller crew, with a captain, sometimes a mate, and one to a few sailors.

Also, there are other workers on ships, such as cooks, electricians, and mechanics, who do not need a merchant marine license. For more information, see the profiles on cooks, electricians, and general maintenance and repair workers.

The following are some types of water transportation occupations:

Captains, sometimes called masters, have overall command of a ship. They have the final responsibility for the safety of the crew, cargo, and passengers. Captains typically do the following:

• Supervise the work of other officers and the crew
• Ensure that proper safety procedures are followed
• Assess their crew's abilities and determine if more workers are needed
• Prepare a maintenance and repair budget
• Oversee the loading and unloading of cargo or passengers
• Keep logs and other records that track the ship's movements and activities
• Interact with passengers on cruise ships

Mates, or deck officers, direct the operation of a ship while the captain is off duty. Large ships have three officers, called first, second, and third mates. The first mate has the highest authority and takes command of the ship if the captain is incapacitated. Usually, the first mate is in charge of the cargo and/or passengers, the second mate is in charge of navigation, and the third mate is in charge of safety. On smaller vessels, there may be only one mate. Deck officers typically do the following:

• Alternate watches with the captain and other officers
• Supervise and coordinate the activities of the deck crew
• Directly oversee docking the ship
• Monitor the ship's position, using charts and other navigational aides
• Determine the speed and direction of the vessel
• Inspect the cargo hold during loading, to ensure that the cargo is stowed according to specifications
• Make announcements to passengers, when needed

Pilots guide ships in harbors, on rivers, and on other confined waterways. They work in places where a high degree of familiarity with local tides, currents, and hazards is needed. Many pilots are independent contractors and go aboard a ship to guide it through a particular waterway. Some, called harbor pilots, work for ports and help many ships coming into the harbor during the day.

Sailors, or deckhands, operate and maintain the vessel and deck equipment. They make up the deck crew and keep all parts of a ship, other than areas related to the engine and motor, in good working order. New deckhands are called ordinary seamen and do the least-complicated tasks. Experienced deckhands are called able seamen and usually make up most of a crew. Some large ships have a boatswain, who is the chief of the deck crew. Sailors typically do the following:

• Stand watch, looking for other vessels or obstructions in their ship's path, as well as looking for navigational aids, such as buoys and lighthouses
• Steer the ship and measure water depth in shallow water
• Do routine maintenance, such as painting the deck and chipping away rust
• Keep the inside of the ship clean
• Handle lines when docking or departing
• Tie barges together when they are being towed
• Load and unload cargo
• Help passengers, when needed

Ship engineers operate and maintain a vessel's propulsion system. This includes the engine, boilers, generators, pumps and other machinery. Large vessels usually carry a chief engineer, who has command of the engine room and its crew, and a first, second, and third assistant engineer. The engineer's alternate oversees the engine and related machinery. Engineers typically do the following:

• Maintain the electrical, refrigeration, and ventilation systems of a ship
• Start the engine and regulate the vessel's speed, based on the captain's orders
• Record information in an engineering log
• Keep an inventory of mechanical parts and supplies
• Do routine maintenance checks throughout the day
• Calculate refueling requirements

Marine oilers work in the engine room, helping the engineers keep the propulsion system in working order. They are the engine room equivalent of sailors. New oilers are usually called wipers or pumpmen on vessels handling liquid cargo. With experience, an oiler can become a Qualified Member of the Engine Department (QMED). Marine oilers typically do the following:

• Lubricate gears, shafts, bearings, and other parts of the engine or motor
• Read pressure and temperature gauges and record data
• Help engineers with repairs to machinery
• Connect hoses, operate pumps, and clean tanks

Motorboat operators run small, motor-driven boats that carry six or fewer passengers. They work for a variety of services, such as fishing charters, tours, and harbor patrols.

Hand laborers and material movers transport objects without using machines. Some workers move freight, stock, or other materials around storage facilities; others clean vehicles; some pick up unwanted household goods; and still others pack materials for moving.

Hand laborers and material movers typically do the following:

• Manually move material from one place to another
• Pack or wrap material by hand
• Keep a record of the material they move
• Use signals to assist machine operators who are moving larger pieces of material, when necessary

In warehouses and wholesale and retail operations, hand material movers work closely with material-moving machine operators and material recording clerks. Automatic sensors and tags are increasingly being used to track items that allow these employees to work faster. Some workers are employed in manufacturing industries in which they load material onto conveyor belts or other machines.

The following are some examples of hand laborers and material movers:

Laborers and hand freight, stock, and material movers move materials to and from storage and production areas, loading docks, delivery trucks, ships, and containers. Most of these movers work in warehouses, although their specific duties vary. Some workers, called pickers, find products in storage and transport them to the loading area. Other workers load and unload cargo from a truck. Sometimes they open containers and sort the material.

Hand packers and packagers package a variety of materials by hand. They may label cartons, inspect items for defects, and record items packed. Some of these workers pack materials for shipment and transport them to a loading dock. Others work in retail as gift wrappers. Many hand packers are employed by grocery stores, where they bag groceries for customers at checkout.

Machine feeders and offbearers process materials by feeding them into equipment or by removing materials from equipment. This equipment is generally operated by other workers, such as material-moving machine operators. Machine feeders and offbearers might help the operator if the machine becomes jammed or needs minor repairs. Machine feeders track the amount of material they process during a shift.

Cleaners of vehicles and equipment clean automobiles and other vehicles, as well as storage tanks, pipelines, and related machinery. They use cleaning products, vacuums, hoses, and brushes. Most of these workers clean cars at a carwash, automobile dealership, or rental agency. Some clean industrial equipment at manufacturing firms.

Refuse and recyclable material collectors gather garbage and recyclables from homes and businesses to transport to a dump, landfill, or recycling center. Many collectors lift garbage cans by hand and empty them into their truck. Some collectors drive the garbage or recycling truck along a scheduled route. When collecting materials from a dumpster, drivers use a hydraulic lift to empty contents of the dumpster into their truck.