Testing lasted almost three weeks and proved that the submarine could reach a depth of 72 feet and a maximum speed of 4 knots.

It forms numerous herds at a certain distance from the substrate, but occasionally it can reach a depth of about 700 m, especially at night.

These overdeepened cuts into bedrock structures can reach a depth of several hundred metres below the valley floor.

Only the superficial epithelial cells of the epidermis or of the mucosa are lost, and the lesion can reach the depth of the basement membrane.

Adults and nymphs live underground throughout the year in extensive tunnel systems that may reach a depth of over a metre in the winter.