Inkwiliumbhobhoukhetho lwezinto eziphathekayo kufuneka luhlangabezane noyilo kunye nokubeka umbhobho we-offshore kunye neemfuno zokwakha.Ngophuhliso lweshishini lombhobho wenkwili, ukuthembeka kombhobho kuye kwanda ngamandla, kodwa iindlela zokwenziwa kwemibhobho yombhobho ongaphantsi kwamanzi azikho iimfuno ezikhethekileyo, ezinjengombhobho wentsimbi ongenamthungo, iintlobo ngeentlobo ze-arc ekhuselweyo yokuwelda umbhobho wentsimbi womthungo othe tye, njl. njl.Ukuhlangabezana neemfuno zoyilo kunye nokufakwa phantsi kwesiseko, ukukhetha umbhobho wezoqoqosho kakhulu.

Ngokwandiswa kophuhliso lwe-oyile ye-offshore yaseTshayina, ukwakhiwa kwemibhobho engaphantsi kolwandle emva kweminyaka yokuhlola okuqhubekayo kunye nokuphuculwa ngokwemigaqo yenkqubo ephambili yeqela lokwakha, ukuwelda, ukuvavanywa, kunye nezinye isandi sesayensi.Umzila wokwakhiwa kwemibhobho engaphantsi kolwandle, ukusebenza kakuhle kunye nokwakhiwa komgangatho ophezulu, iteknoloji yenkqubo iye yanda kakhulu, ngakumbi egameni lomgangatho wobuchwephesha bokwakha umbhobho we-submarine, ukuphucula umgangatho wamandla wentsimbi yombhobho we-submarine, ukusebenza kobugcisa bophuhliso lombhobho we-welding kunye nomgangatho ophezulu. ukusebenza kakuhle kwemveliso, ukusebenza kweendleko eziphezulu zenkqubo ye-welding ezenzekelayo yinto ephambili, ukuze ulungelelanise isantya sophuhliso lokwakhiwa kombhobho wenkwili.