Which of the following statements concerning the alignment procedure for Inertial Navigation Systems(INS)/Inertial Reference Systems (IRS) at mid-latitudes is correct?
INS/IRS can only be aligned in the ALIGN mode.
INS/IRS can be aligned in either the ALIGN or NAV mode.
INS/IRS can be aligned in either the ALIGN or ATT mode.
INS/IRS can only be aligned in NAV mode.