TM 55-1510-220-10 Table 3-1.  Various Values for UTM Grid Coefficients FLATNESS RELATIVE SPHEROID COEFFICIENT RADIUS International 29700 8388 m Clark 1866 29498 8206 m Clark 1880 29346 8249 m Everest 30080 7276 m Bessel 29915 7397 m Modified Everest 30080 7304 m Australian National 29825 8160 m Airy 29932 7563 m Modified Airy 29932 7340 m SOURCE Universal Transverse Mercator Grid Technical Manual, TM 5-241-8, Headquarters, Department of the Army, 30 April 1973, page 4. Flatness Coefficient: 100 (1/f) Relative Radius:   a-6, 3700,000 NOTE Output test signals are supplied to the autopilot when INS steering is selected. Rotating AUTO/MAN switch  to  AUTO  and  pressing  TEST during  alignment  furnishes  a  15°   left bank steering command.  A 15 °  right bank  steering  command  is  furnished when   AUTO/MAN   switch   is   set   to MAN. NOTE The    quick    test    procedure    may    be performed   any   time   after   alignment state "8" is reached and prior to entry into NAV. (a)  Mode selector (MSU) ALIGN. Observe CDU displays are illuminated. (b)  Data selector (CDU) DSRTK/ STS.  Monitor right data display until state "8" (or lower) is reached.  Observe right data display is -N4, where "N" is not 9gn. (c)     AUT-MAN   switch  (CDU)   MAN. (d) INS Couple to flight director and autopilot, as applicable. (e)     Data    selector    Set    to    any    position    except DSRTK/STS. (f)     CDU  TEST    switch  Hold  depressed.    After performing the preceding step, observe: 1. All     annunciators     on     MSU     Check illuminated. 2. All   annunciators   on   CDU   All   "8's" displayed. 3. HSI        All      angles      30°.    Crosstrack deviation  bar  one  dot  right.    All  INS flags retracted. Change 2  3-52