Aircraft being operated under IFR are required to have, in addition to the equipment required for VFR and night, at least

(Refer to figure 91.) What are the oxygen requirements for an IFR flight eastbound on V520 from DBS VORTAC in an unpressurized aircraft at the MEA?

What minimum conditions are necessary for the instrument approaches required for IFR currency?

What are the minimum fuel requirements for airplanes in IFR conditions, if the first airport of intended landing is forecast to have a 1,500 foot ceiling and 3 miles visibility at flight-planned ETA? Fuel to fly to the first airport of intended landing,

(Refer to figure 29.) What are the hours of operation (local standard time) of the control tower at Eugene/Mahlon Sweet Field?