DiveAlert DMB1 Surface Marker Buoy (SMB)

DiveAlert DMB1 Surface Marker Buoy for Underwater and Surface Signaling

The DiveAlert DMB1 Surface Marker Buoy (SMB) is a durable, high-visibility inflatable buoy designed to help scuba divers communicate their location and improve visibility during diving activities. Featuring semi-closed-circuit construction with a one-way valve, this surface marker buoy helps prevent air from escaping when inflated at the surface. Divers can also deploy it from depth to create a visible surface reference for boat crews and other water users.

Constructed from durable 400 Denier polyurethane-coated nylon, the DMB1 is designed for repeated use in demanding diving environments. Its 65-inch length, approximately 8-inch width, and 40 lb lift capacity provide visibility and additional flotation support. SOLAS reflective tape across the top improves visibility in daylight and low-light conditions, while the integrated over-pressure valve helps release excess air to prevent overinflation.

Why Choose the DiveAlert DMB1 Surface Marker Buoy

• Semi-closed-circuit construction with a one-way valve helps prevent air loss at the surface.
• Can be inflated at the surface for visual signaling or additional flotation.
• Can be deployed from depth as a surface marker to communicate a diver's location.
• SOLAS reflective tape improves visibility during daytime and nighttime conditions.
• Integrated over-pressure valve helps prevent bursting from excess internal pressure.
• Designed with an easy air-dump function for releasing excess air.
• Durable 400 Denier polyurethane-coated nylon construction for repeated diving use.
• Top nylon strap handle provides an attachment point for a dive light or slate.

Key Features

• Brand: DiveAlert.
• Model: DMB1.
• Product type: Surface marker buoy (SMB).
• Construction: Semi-closed-circuit with one-way valve.
• Material: 400 Denier polyurethane-coated nylon.
• Length: 65 inches.
• Width: 8 inches.
• Lift capacity: Approximately 40 lb.
• Reflective material: SOLAS reflective tape across the top.
• Safety feature: Integrated over-pressure valve (OPV).
• Air release: Over-pressure valve and air-dump function.
• Attachment point: Nylon strap handle on top.
• Available colors: Orange or yellow.
• Inflation method: Compatible second-stage regulator.
• Application: Underwater deployment, surface signaling, and redundant flotation.

Easy Inflation and Deployment

The DiveAlert DMB1 can be inflated at the surface or deployed from underwater to provide a visible surface reference. Inflation can be performed using a compatible second-stage regulator. Its one-way valve helps retain air after inflation, while the over-pressure valve releases excess pressure to help protect the buoy from overinflation. The top nylon strap also provides a convenient attachment point for accessories such as a dive light or slate.

Perfect For

• Recreational scuba divers.
• Technical and advanced divers.
• Boat-based diving operations.
• Divers who need a visible underwater-to-surface signaling device.
• Divers seeking additional surface flotation support.
• Diving activities requiring improved surface visibility and location marking.

Improve Your Surface Visibility and Dive Signaling

Stay visible and communicate your location more effectively with the DiveAlert DMB1 Surface Marker Buoy. Combining durable nylon construction, reflective visibility features, a one-way inflation valve, and an integrated over-pressure valve, this SMB provides a practical signaling and flotation option for recreational and technical diving activities.

Important: Always follow the manufacturer's inflation and deployment instructions. Use appropriate buoyancy and line-management techniques when deploying an SMB underwater. The stated 40 lb lift capacity is approximate and should not be treated as a substitute for a properly rated BCD or other primary buoyancy system.