The Closed Buoy 11/117 cm is a high‑visibility surface marker buoy designed for divers who require reliable performance in a streamlined format. With a height of 117 cm and a width of 11 cm, this buoy offers excellent portability without compromising on stability or surface visibility. Its sealed construction, combined with an OPR valve and metal oral inflation valve, makes it a dependable signalling tool for recreational divers, instructors, and technical divers who prefer a smaller SMB that still delivers strong performance.

This buoy is built as a closed‑cell SMB, meaning it seals completely once inflated. This prevents water from entering the buoy and ensures it maintains buoyancy even in rough or choppy surface conditions. Its compact size makes it ideal for divers who want a reliable marker that is easy to stow in a pocket or clipped to a harness, while still providing enough height to be seen by boats and surface support teams.

The buoy can be inflated using a low‑pressure inflator hose, an alternate air source, or the integrated metal oral valve. Once deployed, the sealed design traps air securely, allowing the buoy to stand upright and remain stable throughout ascent and at the surface.

A key safety feature of this buoy is the OPR valve, which automatically vents excess internal pressure. This is essential when deploying the buoy from depth, where expanding air during ascent could otherwise cause over‑inflation or damage to the buoy’s seams.

The OPR valve:

• Prevents over‑pressurisation during ascent
• Protects the buoy’s structural integrity
• Ensures safe, controlled venting without manual intervention
• Extends the buoy’s lifespan through repeated use

This makes the buoy suitable for both shallow and deeper deployments, offering divers confidence in its durability and safety.

The buoy includes a durable metal oral inflation valve, providing a reliable manual inflation option. The metal construction offers enhanced longevity and resistance to wear compared to plastic alternatives, making it ideal for frequent use or harsher diving conditions.

Key features include:

• Smooth, efficient airflow for easy oral inflation
• One‑way internal mechanism to prevent air loss
• Push‑to‑deflate function for controlled air release
• Corrosion‑resistant metal body for long‑term reliability

This valve gives divers flexibility and redundancy, ensuring the buoy can be inflated in any situation.

The buoy is made from high‑strength, abrasion‑resistant fabric designed to withstand saltwater exposure, UV light, and repeated handling. Reinforced seams provide long‑term durability, while the bright colour enhances visibility in low‑light or high‑swell conditions.

The closed‑cell design ensures the buoy remains inflated even if submerged after deployment, maintaining its shape and stability at the surface.

This buoy is ideal for:

• Recreational and training dives
• Drift diving
• Surface signalling for boat pickups
• Technical diving requires compact SMBs
• Travel‑friendly dive kits