The SS Hartdale was sunk by a German U-boat in 1915 and its final resting place had long been unknown. Australian navy divers have suffered minor injuries from a sonar pulse by a Chinese navy vessel.

Don’t get stuck with an unsafe boat needing costly repairs. Insure your 1988 Ross Marine Inc SONAR 23 for just $100/year*. More freedom: You’re covered on all lakes, rivers and oceans within 75 miles ...

Don’t get stuck with an unsafe boat needing costly repairs. Insure your 1990 Ontario Yachts Ltd SONAR for just $100/year*. More freedom: You’re covered on all lakes, rivers and oceans within 75 miles ...

Keith Cormican, founder of Bruce's Legacy, specializes in this kind of search. His brother drowned in 1995 and it sparked his decision to start the nonprofit.