c     NCLFORTSTART
      subroutine composit(sstD,sstN,lat,lon,nlat,nlon,miss,sst)

      integer nlon,nlat
      real sstD(nlon,nlat),sstN(nlon,nlat)
      real lat(nlat),lon(nlon)
      real sst(nlon,nlat)
      real miss
c     NCLEND
c a note about the lat range
      do i =1,nlon-1
         do j=1,nlat
            sst(i,j) = sstD(i,j)
            if(sst(i,j).eq.miss)then 
               if(sstN(i,j).ne.miss)then
                  sst(i,j)=sstN(i,j)
               endif
            endif
            if(sst(i,j).ne.miss)then
               if(lat(j).ge.-8.7 .and. lon(i).lt.-76.)then
                  if(sst(i+1,j).eq.miss)then
                     sst(i,j) = miss
                     go to 12
                  else
                     sst(i,j) = miss
                  endif
               endif
 12                        if(lat(j).ge.-14.5 .and. lon(i).lt.-83.5)then
                  if(sst(i+1,j).eq.miss)then
                     sst(i,j) = miss
                     go to 14
                  else
                     sst(i,j) = miss
                  endif
               endif
 14                        if(lat(j).ge.-15. .and. lon(i).lt.-90.)then
                  if(sst(i+1,j).eq.miss)then
                     sst(i,j) = miss
                     go to 16
                  else
                     sst(i,j) = miss
                  endif
               endif
            endif
 16               enddo
      enddo
      
      return
      end