Section 121.100 - General requirement(a) Vessel control systems and other miscellaneous systems and equipment required by this part must be suitable for the purposes intended.(b) The cognizant Officer in Charge, Marine Inspection (OCMI) may require navigation, control, or communications equipment, in excess of the equipment specifically required by this part, on a vessel that is of a novel design, operates at high speeds in restricted or high traffic areas, operates in a dynamically supported mode, or operates on extended routes or in remote locations.