lgbk (r lg bk) s rcrd sd t rcrd stts, vnts, r cndtns pplcbl t cmplx mchns r th prsnnl wh prt thm. Lgbks r cmmnly ssctd wth th prtn f rcrft, nclr plnts, prtcl cclrtrs, nd shps (mng thr pplctns).
Th trm lgbk rgntd wth th shp's lg, mrtm rcrd f mprtnt vnts n th mngmnt, prtn, nd nvgtn f shp. Th cptn ws rspnsbl fr kpng lg, s mnmm, f nvgtnl wnd, spd, drctn nd pstn.