Escola de Mergulho de Barcelos (EMB) is a Portuguese diving school offering training, underwater activities and related equipment through its online shop. The school is affiliated with the Portuguese Federation of Underwater Activities and serves as a training and diving centre associated with FPAS/CMAS, SSI, DAN and TDI. Its course range includes beginner and continuing scuba-diving options, alongside specialist subjects such as nitrox, navigation, dry-suit diving, boat diving, stress and rescue, and search and recovery. EMB also offers snorkelling courses, including diver and instructor training.

For people seeking an introduction to the water, the school promotes first dives in a pool or at sea, as well as nautical outings and group activities. Its listed experiences include visits to the lagoons of Caíde and trips to the Berlengas. EMB also identifies itself as a Maritime-Tourism Operator, extending its activities beyond formal instruction. Customers can browse courses and diving equipment through the shop, while the website shares news, activities and contact information.