trackless

monitored, analyzed, traced, hunted, chased, ferreted, examined, linked, measured, compiled, tagged, charted, corresponded, searched, stalked, zeroed, interviewed, scanned, mapped, scrutinized, tabulated, checked, picked, relayed, pinpoint, chronicled, slowed, verified, identified, sped, inputted, combed, scoured, jotted, homed, documented, probed, researched, matched, driven, contacted, collated, investigated, dragged, flagged, followed, studied, forwarded, reviewed, detected, evaluated, apprehended, debriefed, paralleled, corralled, tailing, reported, retrieved, processed, locates, pushed, moved, correlated, turned, outpaced, targeted, whittled, transported, extrapolated, trawled, filtered, sifted, spotted, logged, winnowed, canvassed, scouted, brought, flown, lured, notified, sicked, uploaded, gauged, cataloged, sighted, zoomed, databased, quickened, calculates, overtaken, swooped, global positioning system, counted, fluctuated, hauled, accounted, plotted, collected, eyeballed, zigzagged, raced, track, powered, programmed, moving, robotic, serviceable, streamlined, unmarked, connected, fastest, ton, addressable, built, identifiable, instrumented, made, maneuverable, noncritical

caterpillar-tracked, caterpillar track, caterpillar tread, disc, disk, head, phonograph record, phonograph recording, platter, radar fire, record, snowmobile, traceable, track, trackable, untraceable

caterpillar, half-track, half-tracked