Trouble compiling an old FORTRAN file

Hi. Somebody gave me some code that I need for some of my research. I tried to compile the code with g77 but was unsuccessful. Maybe you know what compiler it should use if not g77. The code was meant to run on windows NT. It was actually written for the WATCOM fortran compiler but I don't know where to get the old compilers of WATCOM. To be specific, the command in the console was "wfl386 mystest.for" to compile such a file. Here is the code for one of the many files I have:

      PROGRAM UNFORMAT_COAST

c     reads    formatted file: coast.fmt
c     writes unformatted file: coast$d.dat

      parameter    (mxp=10650)

      STRUCTURE    /segment/
         integer*2  ndx
         integer*2  nrp
         integer*2  nrc
         integer*2  lat(mxp)
         integer*2  lon(mxp)
      END STRUCTURE
      record       /segment/line

      logical       eof

      OPEN (15,file='coast$d.dat',status='unknown',form='unformatted')
      OPEN (16,file='coast.fmt',  status='old')

      eof=.false.
      do while (.not.eof)

         read  (16,'(3i5/(10i6))')
     &          line.ndx,
     &          line.nrp,
     &          line.nrc,
     &         (line.lat(n),
     &          line.lon(n),n=1,line.nrp)

         write (15)
     &          line.ndx,
     &          line.nrp,
     &          line.nrc,
     &         (line.lat(n),
     &          line.lon(n),n=1,line.nrp)

         if (line.ndx .eq. 9000) go to 19
      end do
19    CLOSE (15)
      CLOSE (16)
      STOP
      END   ! UNFORMAT_COAST

Thank you
Etienne Koen