Marine skinsuits, at least in the RMN, were less comfortable and flexible, but provided more protection against damage, including from some kinds of small arms fire. Marine battle armor was very much more resistant and was used in more dangerous environments.(HH1, HH2) For heavy work in vacuum conditions, as in an orbital shipyard, heavier duty suits were used which often included small maneuvering units (ie, thruster jets), special tool storage, communication equipment, etc. They were incompatible for numerous reasons with work in any shipboard environment where fine work in close cramped quarters may be required.