Kunomugqa obaluleke kakhulu eDenmark, ngoba wehlukanisa iNhlonhlo yaseJutland neSweden ngaphezu kokujoyina uLwandle iBaltic neNorth Sea. Ubizwa ngegama Umzila weKattegat futhi ingamakhilomitha angama-220 ubude. Kunenqwaba yeziqhingi ezingabonakala ngasentanjeni, yize iSamso, iLaeso ne-Anholt yizona ezinkulu kunazo zonke.
Igama le-strait livela emagameni amabili esiDashi. Elinye lithi "kat" futhi lisho ikati, kanti elinye "gat" elihumusha libe imbobo. Ukuqonda ukuthi kungani leli gama kumele sibuyele emuva eNkathini Ephakathi. Kuthiwa ngalezo zikhathi kwakunzima kakhulu ukugeleza emanzini ayo, ngoba ukuba mncane kakhulu (kangangoba kwesinye isikhathi kuthathwa njenge-bay) ukwakheka kwezindunduma zesihlabathi kwakuyinto ejwayelekile.
Njengoba sesishilo, uKattegat ufeza umsebenzi oyingqophamlando, kusukela hlukanisa izizwe ezimbili, okuyiDenmark neSweden. I- “International Hydrographic Organisation” (IHO), okuwumzimba onegunya eliphakeme kakhulu lamazwe omhlaba uma kukhulunywa ngokubeka imikhawulo yolwandle, ibheka le nkinga njengenye yezilwandle zayo futhi iyinikeza inombolo yesi-2 njengenkomba.