A dive buoy is essential safety equipment for every spearfisher and freediver — it marks your position on the surface for passing vessels, carries your catch and gear, serves as a rest point between dives, and anchors your float line and shooting line system. No diver should enter open water without a visible surface float and the correct flag for their jurisdiction. This category covers dive floats, float lines, bungee lines, dive flags, SMBs, and buoy accessories for freediving, spearfishing, and underwater sports.

Why a Buoy Is Non-Negotiable

Diving without a surface float in open water is one of the most common causes of serious incidents involving boats and divers. A brightly coloured buoy flying the correct dive flag is the internationally recognised signal that a diver is below — instructing vessel operators to stay clear and reduce speed. In many jurisdictions, diving without a surface marker and dive flag in navigable waters is illegal. Beyond legal obligation, a float provides a physical anchor point in current, a resting platform during breathe-up, a place to secure harvested fish, and a means for a safety diver or buddy to track your position at all times.

Types of Dive Float

Torpedo / sausage float — The most common spearfishing float — an elongated inflatable or rigid foam body with a low drag profile when towed through the water. Available in 1 ATM (standard inflation) and 3 ATM (high-pressure, puncture-resistant) versions. The 3 ATM float is the standard choice for bluewater and pelagic spearfishing where a large powerful fish could pull the float under — a standard 1 ATM float can be submerged by a large tuna or amberjack, a 3 ATM float cannot

Round / doughnut float — A round or oval inflatable float — stable in swell and chop, self-righting due to its low centre of gravity. Often used as a reef and rock platform float where gear storage and stability are prioritised over towing speed

Hard foam / polystyrene float — Cannot be punctured — completely maintenance-free and indestructible in normal use. Less compact for transport than inflatables. Suitable for calmer coastal conditions where towing drag is less critical

Freediving training float — A lightweight, minimal float used in pool and open water training — provides a rest point and a line anchor for depth work. Typically smaller and more streamlined than a full spearfishing rig

Dive Flags

Alpha flag (blue and white) — The international maritime signal flag for “diver below” — a blue and white swallowtail design recognised under the International Regulations for Preventing Collisions at Sea (COLREGS). Required in international and many European waters. Vessels are required to give way and reduce speed when the Alpha flag is displayed

Diver down flag (red with white diagonal stripe) — The standard diver flag used in North America and the Caribbean. Not a maritime signal flag under COLREGS but widely recognised and legally required in many US, Canadian, and Caribbean jurisdictions. Vessels are required by local law to maintain a safe distance from a displayed diver down flag

Which flag to use — Carry both where possible — the Alpha flag for international maritime recognition and the diver down flag for local legal compliance. Many spearfishing floats include a flag pole mount as standard — check your local jurisdiction requirements before diving

Float Lines & Bungee Lines

The float line connects the diver to the buoy — running from a clip on the speargun or diver’s belt to the float on the surface. Line configuration varies significantly depending on the diving style and target species. For reef and coastal spearfishing, a standard floating polypropylene or Dyneema line of 10–30 metres is sufficient. For bluewater and pelagic hunting, a bungee float line is the correct choice — the elastic core absorbs the shock load when a large powerful fish runs, preventing the gun being ripped from the diver’s hands and protecting all connection points from sudden peak loads.

Standard float line — Floating polypropylene or braided Dyneema line — does not sink, keeping the line off the bottom and reducing snagging on reef structure. 10–30 metres covers the majority of reef and coastal spearfishing applications. Use floating line only — sinking line creates dangerous entanglement risk on reef terrain

Bungee / elastic float line — An elastic core line that stretches 200–300% under load — absorbing the shock of a running fish and dramatically reducing peak forces on the gun, reel, and diver. Essential for bluewater spearfishing targeting pelagic species. Typically rigged with a 5–10 metre bungee section from the gun end connected to a longer Dyneema main run to the float

Reel line — Used in combination with a speargun reel — allows the diver to control line deployment and retrieval directly from the gun rather than from a fixed float line length. Common in cave, wreck, and deep reef diving where a fixed line length is impractical

Connection hardware — Stainless steel clips, swivels, shackles, and quick links connect the float line to the gun, buoy, and fish stringer. Use only stainless steel rated hardware for salt water use — galvanised fittings corrode rapidly and can fail without warning under load

SMBs — Surface Marker Buoys

A surface marker buoy (SMB) — also called a safety sausage — is a compact inflatable tube carried by the diver and deployed at depth or on the surface to signal position to a boat or safety cover. An SMB is a personal safety device carried in addition to a main dive float — deployed when a diver surfaces away from the main float in current, after a bluewater drift dive, or in any situation where the diver needs to be immediately visible to a vessel or safety team. Every diver diving in open water with boat traffic or in current should carry a compact SMB as standard safety equipment.

Buoy Accessories & Extras

Fish stringers / catches — A metal or rope stringer attached to the float that holds harvested fish away from the diver’s body during the session — reducing shark interest and keeping the catch secure and fresh. Essential for any diver taking fish for the table

Float weights / keels — A small lead weight clipped to the underside of the float keeps it self-righting in swell and prevents the dive flag from inverting in wind. A keel weight of 0.5–1 kg is standard for torpedo-style floats in open water conditions

Buoy bags / carry cases — Mesh or nylon bags for transporting inflated or deflated floats. Particularly useful for travel and for keeping float lines neatly coiled and tangle-free between sessions

Repair patches — Adhesive PVC or TPU repair patches for inflatable float repairs. A small repair kit in the dive bag means a punctured float can be field-repaired and returned to service rather than written off after a single incident

error:
Chat with us
×

Main Menu