Install, adjust, or maintain mobile electronics communication equipment, including sound, sonar, security, navigation, and surveillance systems on trains, watercraft, or other mobile equipment.

Adjust, repair, or replace defective wiring and relays in ignition, lighting, air-conditioning, and safety control systems, using electrician's tools. Cut openings and drill holes for fixtures, outlet boxes, and fuse holders, using electric drills and routers . Inspect and test electrical systems and equipment to locate and diagnose malfunctions, using visual inspections, testing devices, and computer software. Install electrical equipment such as air-conditioning, heating, or ignition systems and components such as generator brushes and commutators, using hand tools. Install fixtures, outlets, terminal boards, switches, and wall boxes, using hand tools. Install new fuses, electrical cables, or power sources as required. Locate and remove or repair circuit defects such as blown fuses or malfunctioning transistors. Measure, cut, and install frameworks and conduit to support and connect wiring, control panels, and junction boxes, using hand tools. Reassemble and test equipment after repairs. Refer to schematics and manufacturers' specifications that show connections and provide instructions on how to locate problems. Repair or rebuild equipment such as starters, generators, distributors, or door controls, using electrician's tools. Splice wires with knives or cutting pliers, and solder connections to fixtures, outlets, and equipment. Confer with customers to determine the nature of malfunctions. Estimate costs of repairs based on parts and labor requirements. Maintain equipment service records.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance. Computers and Electronics -- Knowledge of circuit boards, processors, chips, electronic equipment, and computer hardware and software, including applications and programming. Engineering and Technology -- Knowledge of the practical application of engineering science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various goods and services.

Repairing -- Repairing machines or systems using the needed tools. Installation -- Installing equipment, machines, wiring, or programs to meet specifications. Equipment Selection -- Determining the kind of tools and equipment needed to do a job. Mathematics -- Using mathematics to solve problems.

Manual Dexterity -- The ability to quickly move your hand, your hand together with your arm, or your two hands to grasp, manipulate, or assemble objects. Finger Dexterity -- The ability to make precisely coordinated movements of the fingers of one or both hands to grasp, manipulate, or assemble very small objects. Arm-Hand Steadiness -- The ability to keep your hand and arm steady while moving your arm or while holding your arm and hand in one position. Near Vision -- The ability to see details at close range (within a few feet of the observer). Control Precision -- The ability to quickly and repeatedly adjust the controls of a machine or a vehicle to exact positions. Visual Color Discrimination -- The ability to match or detect differences between colors, including shades of color and brightness. Extent Flexibility -- The ability to bend, stretch, twist, or reach with your body, arms, and/or legs. Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations). Problem Sensitivity -- The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Trunk Strength -- The ability to use your abdominal and lower back muscles to support part of the body repeatedly or continuously over time without 'giving out' or fatiguing.

Repairing and Maintaining Electronic Equipment -- Servicing, repairing, calibrating, regulating, fine-tuning, or testing machines, devices, and equipment that operate primarily on the basis of electrical or electronic (not mechanical) principles. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources.