Based on an ethnographic fieldwork this paper explores the relation between technology and masculinity in the context of scuba diving. From a theoretical framework based on Heidegger/Kemp and Wajcman, two major questions are put to the material: How is technology influencing social relations and communication? And: How is technology perceived and handled? The first question is answered out of two angels: Judging performance out of handling the equipment and forming the social hierarchy. The second question is answered: out of a practical knowledge, through embodiment and trust.