EnglishFloat arms are buoyancy arms that add lift to an underwater camera rig. They combine arm and flotation in one component, helping to balance housings, strobes and video lights during dives. Unlike separate float accessories that mount onto existing arms, float arms integrate buoyancy directly into the arm itself.
Float arms are buoyancy devices designed to reduce the in-water weight of a housing setup. They connect to trays and clamps to improve stability, handling and positioning during dives.
By countering the heavy mass of housings, strobes and video lights, float arms make it easier to achieve neutral buoyancy. This lowers physical strain and supports steadier filming over long durations.
Float arms integrate buoyancy directly into the arm structure. This means no additional floats are required to achieve lift.
Separate float blocks or buoyancy floats are mounted onto existing arms. These are typically used when a system is already configured and requires additional lift without replacing the arms. Float blocks and buoyancy accessories can be found in floats and belts. They are often used as an add-on to fine-tune buoyancy.
Float arms work by adding displacement that generates upward lift. The effect depends on the arm’s size and internal volume, with larger dimensions producing stronger lift values.
Most float arms are made from aluminium combined with foam or carbon fibre segments. Their sealed designs stop water ingress and ensure buoyancy remains consistent at depth.
Options range from small arms for shallow dives to stronger versions used in technical diving beyond 60 m (≈197 ft). Material choice influences both weight and durability.
Selection depends on the total mass of the equipment and the amount of lift required. Combining different arm sizes helps divers reach stable, neutral buoyancy in varied conditions.
For related components, see trays & arms and strobes & lights. For background reading, consult the underwater buoyancy control guide.
What is the difference between float arms and float blocks?
Float arms combine the arm and buoyancy in one component. Float blocks are mounted onto existing arms to add lift without replacing the arm system.
When should I choose float arms instead of float blocks?
Choose float arms when building or replacing an arm setup. Use float blocks when you already have arms and only need extra buoyancy.
How much buoyancy do I need?
This depends on the weight of the housing, strobes, video lights and accessories. A balanced setup should feel stable without pulling strongly up or down.
Can I combine float arms with separate buoyancy floats?
Yes. Float arms can be combined with separate floats to fine-tune buoyancy, especially on heavier underwater camera systems.
Are float arms compatible with standard trays and clamps?
Most float arms use standard ball connections and clamps, making them suitable for many modular tray and arm systems.
Capturing photos or videos underwater is an amazing way to explore and share another world, but it can be quite challenging. A balanced camera setup not only makes your dive easier but also more enjoyable. In this blog, I’ll walk you through how to weigh your camera setup and pick the perfect buoyancy arms step by step. Let’s dive in!
It is not very comfortable and not safe to dive with an underwater camera set that has a negative buoyancy. You will have to compensate the floating capacity of your trimvest or dry suit. Depending on your position it will also unbalance you.
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