XDEEP Closed 140 smb decompression buoy: test, visibility, and review of the DSMB parachute (2026).

At the end of a drift dive, suspended at a depth of five meters in the blue, as the current carries you away from the reef, the surface marker buoy (SMB) is your only link to the surface. In a choppy sea where waves and foam obscure the silhouettes of divers, an SMB that is too short or that deflates upon contact with the waves becomes a critical hazard. The XDEEP Closed 140 smb deco buoy was developed to ensure perfect verticality and immediate visual signaling for support boats.

The XDEEP Closed 140 smb deco buoy is designed with a closed-tube architecture, 145 cm in length. Its high-visibility orange color was chosen to provide maximum contrast on the water, minimizing the effects of sunlight reflections and marine foam.

Its internal volume guarantees sufficient positive buoyancy to tension the spool line without excessively pulling on the diver during the safety stop. The integrated SOLAS reflective bands significantly enhance optical visibility during twilight or low-light dives.

The presence of a calibrated overpressure valve with a manual purge pull allows for the evacuation of excess air during volume expansion. On the surface, the anti-return valve prevents any accidental deflation when the line becomes slack on a wave crest.

With its straight 145 cm profile, this model stands proudly above the waterline, offering boat watchmen an optimal sighting angle from hundreds of meters away.

Imagine a maritime signaling buoy subjected to swells: if its air volume escapes from the bottom or if its structure lacks rigidity, it will sag on the water and disappear between the waves. The XDEEP Closed 140 SMB deco buoy operates on the principle of a pressurized sealed column: once deployed, its anti-return system and valve maintain a perfect straight geometry for visibility from a distance.

This construction remarkably resists repeated friction, abrasion from salt, and premature aging caused by UV rays during prolonged surface exposure.

Once deflated and rolled up, the XDEEP Closed 140 SMB has a minimal footprint that easily fits into a thigh pocket or under a stabilizer vest strap.

The stainless steel D-ring located at the base allows for direct and secure attachment of your finger spool with a double-ender stainless steel clip.

Priced at a suggested retail price of €75.99, this model offers a level of technical performance perfectly aligned with the safety requirements of modern diving.

The XDEEP Closed 140 smb deco buoy establishes itself as a reliable and robust signaling device. Rated as Acceptable on our comparison tool with an overall score of 3.7 / 5, it combines excellent vertical stability on the surface with secure handling underwater.

To master parachute deployment procedures and perform decompression stops without a reference point- join our online AquaExposure training.

Discover our DSMB parachute comparison tool and all of our diving tools to compare this model with all available options.