TSK (Tauchsport Kaeser AG) is a PADI dive center chain with shops and dive schools in Bern (Liebefeld) and Zurich, and a certified PADI 5-Star Instructor Development Center since 2008. Alongside a full range of courses from kids and beginners to technical and freediving, TSK runs an online and physical dive shop, an equipment rental service covering everything from snorkeling masks to drysuits and technical doubles, and its own repair workshop (WerkTauchStatt) servicing regulators, dive computers, cylinders, BCDs and wetsuits/drysuits. The company operates as a climate-neutral business and organizes dive trips worldwide.