This definition appears very rarely
Samples in periodicals archive:
Mike acquired the relic after a salvage dive in August 2000.
Despite this deluge of fresh and illuminating imagery from the wreck site, through which the public may learn so much about the Titanic, as yet there is no substantial book detailing the salvage dives and including a definitive photographic inventory of what has been brought up.
Parks worked his first salvage dive while he was still a student.