Question 5073 Deck General

The correct answer is D) safety. The type of shackle used in making up tow lines to a MODU (Mobile Offshore Drilling Unit) should be a safety shackle. Safety shackles are designed with a cotter pin or other locking mechanism to prevent the shackle pin from working loose during use, which is critical for securing a tow line connection. This helps ensure the integrity and safety of the towing arrangement. The other options, such as anchor shackles, screw pin shackles, or chain, would not provide the same level of security and reliability required for this application.