- + Integrated dive flag - signals boats
- + Multiple attachment points for dive line and safety sausage
- + Durable PVC
- + Good volume - doesn't pull under with a weighted line
- + Carry bag included
- − Takes time to inflate fully in the field
- − Bulkier to pack than smaller alternatives
Overview
A freediving buoy is not optional equipment. In open water, it does three things: marks your position at the surface so boats know to stay clear, supports your dive line so you have a reference rope for descent and ascent, and provides a rest platform between dives.
Diving without a buoy in open water means no dive line, no position marker for boats, and no surface reference for your buddy. These are not minor inconveniences - they're the basic infrastructure of safe open water freediving.
The Buoy and Line System
The complete setup:
- Buoy - inflatable float with a dive flag, sized to stay visible and support your line
- Line - a vertical rope from the buoy down to a weighted bottom plate
- Bottom weight - keeps the line taut and vertical
- Lanyard or reference plate - optional, used at your target depth as a turnaround point
For training purposes, you add a reference clip at your target depth so you can turn around consistently. This is especially useful for constant weight training where repeatable depth targets matter.
Size and Volume
A buoy needs enough volume to stay buoyant under the downward pull of a weighted dive line. A 5kg bottom weight at 30m of line in moving water requires significant buoyancy to stay on the surface. Buoys in the 25-35L range handle standard recreational training setups. Larger buoys for heavier lines and rougher water, smaller for calm pool or lagoon training.
For our full safety framework: Freediving Buddy System.
Best Overall
Salvimar Freediving Buoy
Salvimar
~$90
- Volume
- ~30L
- Flag
- Integrated dive flag
- Material
- PVC
- Best for
- Open water training, general use
Salvimar's buoy is a solid all-around choice - large enough to stay visible and support a weighted line, with integrated dive flag and multiple attachment points. Durable PVC construction holds up to repeated inflation cycles and UV exposure. Comes with a carry bag.
- Integrated dive flag - signals boats
- Multiple attachment points for dive line and safety sausage
- Durable PVC
- Good volume - doesn't pull under with a weighted line
- Carry bag included
- Takes time to inflate fully in the field
- Bulkier to pack than smaller alternatives
Affiliate link - no extra cost to you
Best Value
Omer Buoy Float
Omer
~$75
- Volume
- ~25L
- Flag
- Attachment point for flag
- Material
- PVC
- Best for
- Recreational open water diving
Omer produces reliable freediving buoys at a slightly lower price point than Salvimar. The build quality is good - durable seams, functional flag attachment, and adequate volume for a standard training line setup. A solid choice if you want quality without the top-tier price.
- Lower price than Salvimar
- Good build quality for the price
- Reliable flag
- Less volume than Salvimar - marginally less stable with heavy lines
- Fewer attachment points
Affiliate link - no extra cost to you
Best for Depth Training
Molchanovs Waypoint Buoy
Molchanovs
~$120
- Volume
- ~35L
- Flag
- Integrated
- Includes
- Line reel, weight attachment
- Best for
- Depth training, competition prep
Designed for structured depth training use. The Waypoint buoy includes a line reel system, weight attachment at the bottom of the line, and is sized to handle a full competition-style dive line setup. If you're doing serious constant weight training, this is the purpose-built option.
- Includes line reel system
- Designed for depth training setup
- High visibility color
- Durable construction
- Expensive for recreational use
- More than most casual freedivers need
Affiliate link - no extra cost to you
Budget Option
IST Sports Freediving Float
IST Sports
~$50
- Volume
- ~18L
- Flag
- Basic attachment
- Material
- PVC
- Best for
- Casual recreational, budget
An accessible entry-level buoy for divers who want open water capability without spending much. Functional for recreational use at shallower depths. Construction is basic but adequate for casual sessions. Not recommended for serious depth training where the line needs reliable support.
- Low price
- Adequate for casual recreational use
- Lightweight and packable
- Basic construction - not for heavy use
- Lower volume - can pull slightly with a weighted line
- Less durable long-term
Affiliate link - no extra cost to you