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diff --git a/math/slalib/cr2af.f b/math/slalib/cr2af.f
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+      SUBROUTINE slCRAF (NDP, ANGLE, SIGN, IDMSF)
+*+
+*     - - - - - -
+*      C R A F
+*     - - - - - -
+*
+*  Convert an angle in radians into degrees, arcminutes, arcseconds
+*  (single precision)
+*
+*  Given:
+*     NDP       int      number of decimal places of arcseconds
+*     ANGLE     real     angle in radians
+*
+*  Returned:
+*     SIGN      char     '+' or '-'
+*     IDMSF     int(4)   degrees, arcminutes, arcseconds, fraction
+*
+*  Notes:
+*
+*     1)  NDP less than zero is interpreted as zero.
+*
+*     2)  The largest useful value for NDP is determined by the size of
+*         ANGLE, the format of REAL floating-point numbers on the target
+*         machine, and the risk of overflowing IDMSF(4).  On some
+*         architectures, for ANGLE up to 2pi, the available floating-
+*         point precision corresponds roughly to NDP=3.  This is well
+*         below the ultimate limit of NDP=9 set by the capacity of a
+*         typical 32-bit IDMSF(4).
+*
+*     3)  The absolute value of ANGLE may exceed 2pi.  In cases where it
+*         does not, it is up to the caller to test for and handle the
+*         case where ANGLE is very nearly 2pi and rounds up to 360 deg,
+*         by testing for IDMSF(1)=360 and setting IDMSF(1-4) to zero.
+*
+*  Called:  slCDTF
+*
+*  Last revision:   26 December 2004
+*
+*  Copyright P.T.Wallace.  All rights reserved.
+*
+*  License:
+*    This program is free software; you can redistribute it and/or modify
+*    it under the terms of the GNU General Public License as published by
+*    the Free Software Foundation; either version 2 of the License, or
+*    (at your option) any later version.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU General Public License for more details.
+*
+*    You should have received a copy of the GNU General Public License
+*    along with this program (see SLA_CONDITIONS); if not, write to the
+*    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+*    Boston, MA  02110-1301  USA
+*
+*  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
+*-
+
+      IMPLICIT NONE
+
+      INTEGER NDP
+      REAL ANGLE
+      CHARACTER SIGN*(*)
+      INTEGER IDMSF(4)
+
+*  Hours to degrees * radians to turns
+      REAL F
+      PARAMETER (F=15.0/6.283185307179586476925287)
+
+
+
+*  Scale then use days to h,m,s routine
+      CALL slCDTF(NDP,ANGLE*F,SIGN,IDMSF)
+
+      END