Among the interesting features of the equipment of later modifications worth mentioning are engine intake dust filters and inflatable deicing boots on the wing and the tail section. The sights were the simplest and consisted of a PBP-1 pilot’s sight and an OPB-1D bomb sight. The fuel system consisted of 14 tanks with a total fuel reserve of up to 2700 liters, enough for a flight of up to 2250 km. The crew consisted of 4 persons: pilot, navigator-gunner behind the pilot, gunner-radio operator, co-pilot. Night flights were possible — there were formation lights, landing lights, instrument lighting, and an artificial horizon. The radio equipment included a long-range communication radio, a command radio, an identification transponder, a radio compass, a marker receiver, a radio altimeter, and an intercom.