What must be done to the ship's propellers, rudders, and projecting devices before entering dry dock?

• A. Props in docking position, rudders locked amidships & retractable projections moved
• B. Props in full forward, rudders unlocked amidships & projections extended
• C. Rudders removed; projections retracted
• D. No changes required

Answer: (A)

Securing propulsion and steering gear for dry-docking by putting propellers in docking position, locking the rudders amidships, and moving retractable projecting devices to safe (retracted/neutral) positions protects the gear and hull during the process. Placing propellers in docking position prevents blades from striking blocks or dock hardware and reduces exposure to any shifting loads. Locking the rudders in the neutral (amidships) position minimizes bending moments on the rudder stocks and linkages as the ship settles on supports. Retracting projecting devices keeps any protruding equipment clear of dock walls and blocks, avoiding damage. Together, this configuration minimizes the risk of damage and interference with dry-dock operations.