for i in {0..180..6}
do 
  if    [ ${i} -lt 10 ]; then
    echo "00${i}"
#    wget ftp://ftp.hycom.org/datasets/GLBy0.08/expt_93.0/data/forecasts/hycom_glby_930_2023051712_t00${i}_ts3z.nc
  elif  [ ${i} -lt 100 ]; then
    echo "0${i}"
    wget ftp://ftp.hycom.org/datasets/GLBy0.08/expt_93.0/data/forecasts/hycom_glby_930_2023112012_t0${i}_ts3z.nc
#  elif  [ ${i} -ge 100 ]; then
#    echo "${i}"
#    wget ftp://ftp.hycom.org/datasets/GLBy0.08/expt_93.0/data/forecasts/hycom_glby_930_2023051712_t${i}_ts3z.nc
  fi
done