Undersea archaeology is not like its landed counterpart: It is certainly far more dangerous and requires much more technology. In order to explore the ocean floor, it's not enough to have documentary records and legends; one must also have sonar, magnetic generators, and metal detectors.
海底考古不比陸上，的確是具高風險與技術性的工作，茫茫大海找海底沉船，文獻、傳說資料之外，還需利用音波探測器、磁石發電機、金屬探測等儀器來幫忙。