[2][clarification needed] The small weight and dimensions of the submarine (4.8 x 1.9 x 3 m) allow the Ictineu 3 to be carried with a conventional truck without requiring special transportation.

The main body is made of inox steel and, at the front, there is a large semi-spheric acrylic glass viewport of 1,200 mm diameter that provides a wide field of view.

Its applications range from submarine archaeology to industrial work, and it is specially designed to be easy to adapt to new technology and equipment, having additional ports for wires, sensors and tools.

[4] The project was originally pitched by the Associació Institut Centre Català de Recerca Submarina and registered in February 2006.

The construction began in a workshop provided by the Maritime Museum of Barcelona[6] but was later moved to dedicated facilities acquired by the company in Sant Feliu de Llobregat.