Complex sentence: The funding would be used by the Gallan Head Community Trust to convert the site and build a visitor centre, gallery, observatory and they also intend to install underwater microphones to allow the public to listen in to whales and other sea mammals.
Split into simpler sentences: The funding would be used by the Gallan Head Community Trust to convert the site and build a visitor centre, gallery and observatory. It is also planned to install underwater microphones to allow the public to listen in to whales and other sea mammals.