/usr/share/doc/seaview/seaview.html is in seaview 1:4.5.3.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/seaview/../../seaview/seaview.html
/usr/share/doc/seaview/../../seaview/seaview.html