🔍 Key Concepts

• GMDSS battery systems typical nominal voltage vs. charging voltage for a 24 VDC bank • Difference between normal charging behavior (voltage and current) and a faulty charger or battery • How a charger-regulated system behaves when you switch from ship’s mains to battery and back

💭 Think About

• Think about what a normal 24 V battery and charger will show on a voltmeter when it is fully charged and on float charge versus when it is being overcharged or not regulated correctly. • Which option describes a pattern that would actually be expected as a healthy charge/discharge cycle (current high at first, then tapering off), and which option sounds like something stuck at an abnormally high level? • Focus on what a “constant” unusually high voltage would suggest about the charger or regulation circuit on a 24 V system.

✅ Before You Answer

• Know that a 24 VDC nominal system usually has a normal float/charging voltage only a few volts above 24 V, not excessively higher. • Check which choices describe changing readings that stabilize at a realistic voltage for a 24 V battery bank versus a reading that stays at an unrealistic level. • Verify which instrument (ammeter vs. voltmeter) you should look at to detect a malfunction in voltage regulation rather than just normal charging current behavior.