Transfer under pressure (TUP) is an intervention method.
OKSEA-TUP diving system provides an air / mixed gas or heliox assisted diving for three divers and a bellman. TUP bell used to lower divers to working depth, divers are in the closed bell. When there is depth, the bell cover opens and the divers can come out of the bell to do the necessary work. When the dive is complete, divers enter the TUP dive bell and close the lid to maintain pressure. The TUP dive bell is pulled to the surface. The surface is connected to the pressure chamber via the bell clamping mechanism raised to the surface and divers can pass into the decompression chamber. The dive depth of the bell, the wet compartment and the whole decompression chamber systems are designed as 100 msw.