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Their crew numbered 58 officers and 1,026 enlisted men.{{sfn|Friedman|1985|p=442}} Over the course of their careers, their crews expanded significantly as equipment was added. After their early 1930s refit, their crew numbered 82 officers and 1,371 enlisted, and by 1945, wartime improvements brought the crews to 129 officers and 1,850 enlisted.{{sfn|Wiper|p=71}} They carried a number of smaller boats for utility purposes while in harbor, as well as to assist with rescue efforts at sea. These included a number of motor [[Launch (boat)|launches]] of various lengths and motor [[whaleboat]]s.{{sfn|Wiper|p=63}}
All three ships were powered by four [[Curtis turbine]]s, with steam provided by nine oil-fired [[Babcock & Wilcox]] [[boiler]]s. ''New Mexico''{{'}}s turbines were used to power electrical motors that drove the [[screw propeller]]s; her system was rated for {{convert|27500|shp|lk=on}}. The latter two ships,
The ships had storage capacity for {{cvt|1467|LT|t}} of fuel oil for the boilers, though additional spaces in the hull could be used to increase capacity to {{cvt|2200|LT|t}}, which provided a cruising range of {{convert|8000|nmi|lk=in}} at a speed of {{convert|10|kn|abbr=on}}. As speed increased, their range decreased significantly: at {{convert|12|kn}}, they could steam for {{cvt|6400|nmi}}, and at {{cvt|20|kn}}, their range fell to {{cvt|2414|nmi}}. Moreover, these figures were assuming the vessels had clean hulls free of marine growth that would inhibit their hydrodynamic efficiency. In service conditions where [[biofouling]] added drag to the hulls, their ranges were reduced even further to {{cvt|5129|nmi}} and {{cvt|1931|nmi}}, respectively.{{sfn|Friedman|1985|p=442}}
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