For iterating over zipped months of buoy data and extracting out the history files.

unzip_his.sh

unzip_his() { for line in $(unzip -l $1 \
                            | grep his \
                            | awk '{print $4}');
              do
                  echo $1 $line
                  unzip -p $1 $line > $(echo $line | sed -re 's/^.+\///');
              done
            }

for zip in "$@"
do
    unzip_his "$zip"
done