Case Study: Hydrographic SurveyInset: Sunken TankMain Photo:Tanks SonarCredit: XylemNovember/December 201624 MTRMTR #9 (18-33).indd 24 MTR #9 (18-33).indd 24 12/7/2016 2:53:44 PM12/7/2016 2:53:44 PM