Fig. 4: Schematic diagram of the hardware scheme and prototype of the MEMS gyrocompass.
From: Removal of the rate table: MEMS gyrocompass with virtual maytagging

a Hardware scheme of the MEMS gyrocompass. It mainly includes the following three parts: the MEMS inertial sensors, north display, and power management module. b Photograph of a single HDRG. The size of a single HDRG is 60 mm × 50 mm × 20 mm. c Prototype of the integrated MEMS gyrocompass. The size is 60 mm × 60 mm × 60 mm, and the weight is 200 g