If the PLB test is SAT, what shows up?

• A. Red indicator light
• B. Green indicator light under test OK, and an audible alarm
• C. No light
• D. Yellow light

Answer: (B)

A PLB’s self-test (SAT) is meant to verify the unit’s basic functions without sending a real distress signal. When you run the SAT, you should see a green indicator light with the label “test OK” and you will hear an audible alarm. This combination confirms the internal checks passed and the unit is functioning properly. A red light would indicate a fault, no light would mean power or test is not active, and a yellow light would signal a warning—none of which describe a successful self-test.