🔍 Key Concepts

• Relationship between shaft tunnels and surrounding spaces like the aft peak tank and machinery space • Purpose of watertight bulkheads in limiting flooding and protecting propulsion systems • Which bulkheads are most critical for flooding control around the shaft tunnel

💭 Think About

• Think about where the shaft tunnel is located in relation to the aft peak and the machinery space. Which ends of the tunnel touch which spaces? • Ask yourself: if flooding occurs in the aft peak or machinery space, which bulkheads around the shaft tunnel MUST be watertight to protect the rest of the vessel? • Consider typical damage-stability practice: do designers usually make boundaries around shaft tunnels watertight, non-watertight, or a mix?

✅ Before You Answer

• Identify which bulkhead is adjacent to the aft peak and which is adjacent to the machinery space • Decide which of those boundaries is more critical to be watertight from a damage-control standpoint • Eliminate any option that makes obviously critical flooding boundaries non-watertight without a good reason