Irtimasi (By submerging the whole body).

373. In Ghusl e Irtimasi water must reach all parts of the body at one time, thus, if a person submerges in the water with the Niyyat of Ghusl, and his feet are touching the ground, then he should pull his feet up from the ground, while remaining inside the water.

374. In Ghusl of Irtimasi, it is recommended that one should perform Niyyat, when ones body is partially outside water.