The forward airtight bulkhead is located at which frame?

• A. Frame 1
• B. Frame 3
• C. Frame 4
• D. Frame 6

Answer: (B)

Understanding how airtight bulkheads and frame locations work on a 29' RBS II helps you visualize buoyancy and flood control. An airtight bulkhead acts as a watertight barrier that keeps water from spilling from one compartment into the rest of the hull, preserving buoyancy and stability.

The forward airtight bulkhead is placed at the third frame from the bow. This position creates a forward buoyant chamber ahead of the bulkhead and keeps the forward space—like the anchor and forward storage areas—isolated from the rest of the hull. By locating the bulkhead here, the boat maintains positive flotation even if the bow takes on water, while still leaving a practical, accessible forward compartment behind it.

If the bulkhead were placed much closer to the bow, there would be less room for a useful forward buoyant block; if it were moved further aft, more of the forward sections could flood before the boundary stops water from spreading, compromising buoyancy and stability.