What is a single-point adjustable suspension scaffold designed to support one employee in a sitting position called?

The correct term for a single-point adjustable suspension scaffold designed specifically to support one employee in a sitting position is known as a boatswain's chair. This type of equipment allows workers to perform tasks at heights while providing them with the necessary support and stability. The design of a boatswain's chair typically includes a seat with safety features such as straps or harnesses to secure the worker safely. This makes it especially suitable for tasks that require hands-free operation, enabling workers to effectively carry out their duties while minimizing the risk of falling.

The other options refer to different types of seating or support equipment that may not offer the same specific applications as the boatswain's chair. The scaffolder's chair is designed more for scaffolding workers but does not have the same single-point suspension capability. The painters' seat is typically used in situations where painters need a platform but lacks the full safety features required for height work. The riggers' seat, while also a form of support, is generally used in different contexts and may not specifically indicate the sitting position or single-point suspension style inherent to a boatswain's chair.