Question 1507 Deck Safety

The correct answer is C) 2 days. According to the regulations, up to two-thirds of a survival craft's required drinking water may be produced by a manually-powered reverse osmosis desalinator, as long as the water can be produced within 2 days. This ensures that the survival craft has access to a sufficient amount of drinking water in the event of an emergency. The other options are incorrect because 12 hours (A) is too short of a time period, and 1 day (B) and 4 days (D) do not meet the 2-day requirement specified in the regulations.