Trimble C3 mechanical total station, a surveying instrument used for taking accurate measurements. The text highlights its features, such as accuracy, range, weight, and operating temperature. It also details the benefits of using the C3, such as its durability, ease of use, and ability to transfer data efficiently. The text also compares the C3 to other Trimble total stations and lists compatible Trimble data collectors and software, providing users with a comprehensive view of its capabilities and potential applications.