Borescope refers to an optical device used for inspecting the interior of objects or spaces that are otherwise inaccessible. This skill involves the use of a flexible or rigid tube equipped with a camera and light source, enabling visual examination of areas such as engines, pipes, and machinery. Knowledge of Borescope is applied to identify defects, assess conditions, and facilitate maintenance by providing detailed imagery of hard-to-reach locations.

Hydraulic Testing refers to the process of evaluating the integrity and performance of hydraulic systems and components by applying pressurized fluid. This skill involves measuring the system's ability to withstand pressure, detect leaks, and ensure proper functioning under operational conditions. Knowledge of Hydraulic Testing is used to assess equipment such as pipelines, valves, and pressure vessels, ensuring safety and compliance with industry standards. The results of hydraulic tests inform maintenance decisions and system design improvements.

Jet Engine refers to the specialized skill set required to design, build and maintain jet engines. This skill requires knowledge in various fields such as thermodynamics, mechanics, materials science, and electronics. Professionals with this skill can work in the aviation, aerospace, and defense industries, where jet engines are used in aircraft, missiles, and other propulsion systems. These experts are responsible for ensuring that jet engines function efficiently, safely, and reliably, and must constantly keep up-to-date with technological advancements in the field.

Propellers refer to mechanical devices with blades that rotate to create thrust, enabling the movement of vehicles through air or water. This skill encompasses the design, analysis, and optimization of propeller systems to enhance performance and efficiency in various applications, including aviation, marine, and industrial contexts. Knowledge of Propellers is used to calculate thrust, assess aerodynamic properties, and improve fuel efficiency by selecting appropriate materials and configurations for specific operational conditions.

The Turbine Blade skill involves expertise in the manufacturing, maintenance, and repair of the blades of jet engines and other types of turbines. This skill requires specialized knowledge of the materials, construction, and performance requirements of turbine blades, as well as the ability to use specialized tools and equipment to ensure their proper operation. Those with this skill are sought-after by aircraft manufacturers, airlines, and other industries that rely on high-performance turbines for power generation and other applications.