Dukane TS500 (TS-500) Underwater Beacon Tester | AvionTEq 16 June 2025 AvionTEq Blog Discover the Dukane TS500 (TS-500) Underwater Locator Beacon Tester—ideal for reliable testing of ULBs in aviation and marine safety. Available at AvionTEq. [More] Share