The index of level of fuel in a tank shows approximate amount of the fuel which is available in a tank (fig. 1.55)
. In due time fill a fuel tank. Watch that the amount of fuel in a tank never decreased below a quarter of full capacity of a tank. If the signaling device of a minimum level of fuel in a tank lit up or the arrow of the index is about the mark «Е» (Is empty), immediately fill a fuel tank.