Alfa Diving operates in the Port of Amsterdam. The company is highly specialized in underwater works, such as maintenance, repair, certification and in-water surveys. All activities are carried out following strict quality standards.

Deep B.V. specializes in underwater surveys for hydrography, geophysics and oceanography. The team operates in ports, coastal zones and offshore areas around the world.

Duikbedrijf Duikerwerken Vos and Peperkamp, ​​e.g. IJmuiden is a dynamic company, which has carried out a large variety of diving activities since 1960, to the great satisfaction of various clients.

Unitek Shipping is a Lithuanian company with a representative office in the Netherlands. The company specializes in various logistics port services. Unitek thus acts as a shipping agent for its clients.