Which of the following clearance readings...

🔍 Key Concepts

• Purpose of dry-docking inspections and what’s typically measured/recorded for future wear comparisons • Which components are expected to wear over time and affect safety or steering (e.g., rudder bearings, stern gear) • Why certain clearances are critical for class/USCG records and alignment checks

💭 Think About

• Ask yourself: Which of these clearances is known to change with wear and is routinely trended over the life of the vessel? • Which item, if its clearance becomes excessive, most directly affects the vessel’s ability to steer safely? • Which clearances are normally checked by class surveyors and shipyard during every dry-docking as a standard item?

✅ Before You Answer

• Identify which option refers to bearing wear rather than just fit between two fixed parts. • Consider which measurement must be repeatable from dock to dock to track progressive wear. • Think about which component’s excessive play would be specifically noted in survey reports and may trigger renewal or repair.

Which of the following clearance readings should be taken and recorded in dry-dock?

The clearances between the propeller blade tips and the hull.

The clearances between the propeller hub and the fair water cone.

The rudder bearing clearances.

The clearances between the stern tube packing gland and the retaining ring.

🔍 Key Concepts

💭 Think About

✅ Before You Answer