The autopilot computer is the main unit in the Simrad AP24 and Simrad AP28 autopilot systems. It contains the steering computer and electronics for the drive unit motor and clutch and provides interface to other system components.

Two models, AC12 (8/16 A motor current) and AC42 (30/50 A motor current) are available. It communicates on the proprietary SimNet data and control network to establish a reliable digital communication and power distribution between the units in the autopilot system as well as other Simrad products. SimNet provides high speed data transfer and control of Simrad products integrated in a total steering and navigatio