Question 3302 Deck General

The correct answer is C) recharged. After using a CO2 extinguisher on a MODU (Mobile Offshore Drilling Unit), it should be recharged. This is because the discharge of the extinguisher depletes the CO2 content, and the extinguisher needs to be refilled with a full charge of CO2 to restore its fire suppression capability. Merely having some CO2 remaining (option D) is not sufficient, as the extinguisher may not have enough agent to effectively fight a fire. Options A and B, hydrostatic testing and retagging, are maintenance tasks that may be required periodically but are not the immediate action needed after discharging the extinguisher.