Question 2886 Deck General

The correct answer is B) pressure exerted by the water. The main factors that make underwater hull repair of a Mobile Offshore Drilling Unit (MODU) difficult are accessibility and the pressure exerted by the water. The high pressure of the water at the depth the MODU is operating makes it challenging to perform repair work. This increased water pressure can make it difficult to access the damaged area and may require specialized equipment and techniques to safely conduct the repair. The other answer choices, such as the availability of tools or the threat of progressive flooding, while relevant factors, are not the primary reasons that make underwater hull repair of a MODU difficult.