The Amco Veba Marine technical manuals contain two rows of weight figures. The first will be labeled HC1 while the other is labeled HC2. The weight numbers reflect the conditions below for each row of figures.
HC1 – for cranes mounted on a vehicle or structures of equivalent flexibility (i.e., vessels).
HC2 – for rigidly mounted cranes (i.e., docks).
Searching Google for “What does crane HC1 and HC2 mean?” will provide an answer.