The Closed Buoy 11/117 cm is a compact yet highly effective surface marker buoy designed for divers who require dependable visibility, secure inflation, and robust construction in a streamlined form factor. With a height of 117 cm and a width of 11 cm, this buoy offers excellent portability without compromising on performance, making it ideal for recreational divers, training environments, and technical divers who prefer a smaller, easily managed SMB.

This buoy is a closed‑cell design, meaning it remains sealed once inflated, preventing water ingress and ensuring stable buoyancy at the surface. Its compact size allows for quick deployment from depth while still providing sufficient height and visibility for surface signalling, drift diving, and decompression stops.

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, ensuring the buoy remains upright and visible even in choppy conditions.

A key safety feature of this model 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 structure and prolongs its lifespan
• Ensures safe, controlled venting without manual intervention

This makes the buoy suitable for both shallow and deeper deployments, offering peace of mind during ascent and decompression procedures.

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

Key features include:

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

This valve gives divers flexibility in how they inflate the buoy, ensuring redundancy and ease of use in any situation.

The buoy is made from high‑strength, abrasion‑resistant fabric designed to withstand repeated exposure to saltwater, UV light, and general wear. Reinforced seams ensure long‑term durability, while the bright colour maximises visibility at the surface.

A stainless‑steel D‑ring is securely attached at the base, providing a strong, reliable connection point for reels, spools, or lift lines. This attachment point is reinforced to prevent tearing or distortion during deployment.

This buoy is suitable for:

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

Its smaller size makes it especially popular among divers who want a reliable SMB without the bulk of larger models.