DIFF Subgroup
G01C 21/22 Plotting boards
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Navigation; Navigational instruments not provided for in groups > Instruments for performing navigational calculations > Plotting boards
CPC:
Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 (measuring distance traversed on the ground by a vehicle G01C22/00; control of position, course, altitude or attitude of vehicles G05D1/00; traffic control systems for road vehicles involving transmission of navigation instructions to the vehicle G08G1/0968) > Instruments for performing navigational calculations (G01C21/24, G01C21/26 take precedence) > Plotting boards
No child classifications to compare. This is a leaf node in both IPC and CPC.