Question 1752 Deck General

The correct answer is D) on or before the expiration date of the power source. The reasoning behind this is that the regulations for personal flotation device (PFD) lights on Offshore Supply Vessels (OSVs) require the lights to be replaced on or before the expiration date of the power source. This ensures the lights remain functional and can serve their purpose of aiding in the visibility and location of PFDs in an emergency. The other options are incorrect because they do not accurately reflect the regulatory requirement for PFD light replacement on OSVs. Replacement intervals of 24 months, 12 months, or 6 months are not specified in the regulations for this type of vessel.