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Spare Part Flag for Mares Technical Buoys
This flag is a specific spare part for Mares technical buoys, also ideal for use on support boats during freediving and spearfishing activities.
Designed primarily to be mounted on the pure freediving training buoy, it provides visible and reliable surface signaling.
Technical Features
- Dimensions: 31.5 x 31.5 cm
- Compatibility: Mares buoys dedicated to freediving
- Use: safe signaling during training and dives
The flag ensures immediate identification of the dive area, essential for safety and effective management of freediving sessions. Its construction is designed to ensure durability and visibility in open-water conditions, meeting the specific needs of freediving and spearfishing.
Hollow Bottom Plate for Freediving and Spearfishing by Mares in Collaboration with Apneautic
The hollow bottom plate is an essential technical accessory for open-water training, designed to be secured approximately 1 meter above the ballast weight located at the lower end of the guide line. This position clearly marks when the target depth has been reached, significantly reducing the risk of hitting the ballast weight during the descent.
Technical and Functional Features
- The fastening system is designed to allow installation without tying knots in the guide line, eliminating the risk of the lanyard carabiner connected to the freediver getting snagged.
- The shape is parabolic upward, optimized to allow a smooth, unobstructed descent.
- Structure with 32 holes around the perimeter for easy and secure attachment of tags, useful for marking depth or other relevant information during underwater activity.
- Compatible with ropes from 10 to 12 mm in diameter.
Materials and Dimensions
The plate is made from high-quality materials that ensure an ideal balance between mechanical strength and flexibility, essential for durability and performance in the water. Its low weight of 230 grams makes it easy to transport, even for freedivers and instructors who travel frequently, including by air.
- Outer diameter: 28 cm
- Weight: 230 g
Installation Instructions
- Pass the guide line through the plate.
- Tighten the fastening die at the desired distance from the ballast weight, recommended at around 1 meter.
- Check the stability of the fastening, making sure there are no knots that could interfere with lanyard passage.
This design allows quick and safe installation, improving ease of use and minimizing potential issues related to the carabiner getting snagged during freediving and spearfishing sessions.
Mares Training Buoy Flag Support
The support is designed to hold the Mares training buoy flag, an essential tool for freediving and spearfishing activities. This accessory ensures stable and functional attachment of the flag to the buoy, making identification and signaling in the water easier during training sessions.
The support is sold separately from the atoll (training buoy) and the flag, allowing you to easily replace or add the component without having to purchase the entire setup.
Technical Features
- Compatible with the specific Mares buoy flag
- Material resistant to corrosion and wear in marine environments
- Designed to keep the flag stable during freediving
- Easy to install and remove on the buoy
This support is an essential component for anyone using training buoys in freediving, as it ensures clear and safe visibility, improving efficiency and practicality during underwater training sessions.
Training Buoy for Freediving and Spearfishing
This training buoy is specifically designed for depth line training sessions, providing essential technical support for freedivers during training.
Construction and Materials
The buoy is made with a durable outer cover that protects the internal air bladder. This shell is perforated in 12 points to ensure effective water drainage, improving buoyancy management and preventing uncontrolled liquid buildup.
Functional Features
- Easy inflation via an oral inflation device, allowing simple and quick operation even in outdoor environments.
- Equipped with 4 handles distributed around the perimeter, designed to assist the freediver during the pre-dive phase and ensure effective control of the buoy in the water.
- Each handle is paired with a D-ring, useful for attaching essential accessories for freediving and spearfishing sessions such as a lanyard, slate, or water bottle.
- A pocket with a sturdy zip closure is located in the center, intended for storing the line during transport, improving practicality and organization.
Technical Specifications
- Volume: 48 liters
- Dimensions: 70 cm long by 17 cm in diameter
- Color: Red for high visibility during training
- Flag and flag holder not included
This training buoy is an essential technical tool for freediving schools and freedivers who want to improve their preparation in a controlled environment, while maintaining visibility and safety during line training.
Best Divers Extendable Flag for Freediving and Spearfishing
The Best Divers extendable flag is specifically designed for use with buoys and atolls, but can also be used on its own on boats dedicated to spearfishing and recreational freediving.
Made with two segments of durable PVC, the shaft offers optimal strength and lightness. The extension mechanism integrates an internal band that ensures stability and makes assembly and disassembly easy in just a few seconds.
The PVC plastic flag ensures high visibility during dives, essential for safety and signaling in the water. Once extended, the shaft reaches a total length of 80 cm, an ideal size for quick, clear recognition.
Technical Features
- Extendable shaft made of 2 PVC segments
- Internal band for stability and quick assembly
- High-visibility PVC flag
- Extended length: 80 cm
- Simple and quick assembly and disassembly
Extendable Best Divers Flag for Freediving and Spearfishing
The extendable Best Divers flag is designed to provide high-visibility signaling for the presence of freedivers or spearfishers, ideal for use on buoys, float boards, or installed separately on boats.
The flag Shaft consists of 5 PVC segments, making it lightweight and durable while ensuring easy extension and quick assembly.
An internal Band ensures stability and optimal tension during use, while the PVC flag is designed to maintain high visibility even in changing light conditions.
Technical Features
- Shaft made of 5 PVC segments
- Internal Band to maintain tension
- Durable, highly visible PVC flag
- Total assembled length: 155 cm
- Quick and easy assembly and disassembly
This solution is designed to provide practicality and reliability for in-water signaling, helping improve safety during freediving and spearfishing sessions. Its light weight and ease of transport make it an effective addition to any freediver’s or spearfisher’s kit.
ProRope - Multipurpose Rope for Freediving Guide Line
ProRope is a multipurpose rope specifically designed for use as a guide line during open-water training sessions for freediving and spearfishing.
This rope offers optimal technical features for setting up guide lines for constant weight and variable weight systems, ensuring efficient and safe handling during dive sessions.
Technical Features
- Available in two diameters: 10 mm and 12 mm
- 50 and 100 meter spools
- White color for excellent visibility in the water
Applications and Use
The ProRope rope is especially valued by freediving schools for setting up guide lines for courses and training sessions, thanks to its reliability and durability. Suitable for both recreational users and those practicing freediving with a more structured approach.
Its construction provides a good balance between mechanical strength and ease of use, ensuring smooth handling and a stable setup during dives.
Tavolara C4 Buoy for Freediving - Purpose-Built Tool for Line Training
Tavolara C4 is a buoy designed specifically for freediving training on the line and for pre-dive phases, ideal for ensuring safety and practicality during sessions at sea.
Technical Features
- Double-chamber construction for greater reliability and safety in the event of damage to the primary chamber
- 850gsm PVC construction with a thickness of 0.7 mm, ensuring strength and mechanical resistance
- Buoy diameter: 80 centimeters
- Height: 18 centimeters
- Two-tone color: White and Black, optimal for visibility in the water
Functionality and Construction Details
- Line and accessory storage compartment accessible via a high-strength YKK zipper, designed for easy use and long service life
- Equipped with a Bravo valve supporting a maximum pressure of 8 psi, for proper inflation management
- Four ergonomic side handles for a secure grip and to allow simultaneous use by multiple freedivers
- Equipped with a compliant diver-down flag to indicate underwater presence at the surface
- Integrated stainless steel D-rings for routing and securing the line, ensuring reliability and resistance to marine corrosion
Recommended Use
The Tavolara C4 buoy is designed to support freedivers during line training, allowing easy line management and a high level of safety in the water thanks to its double chamber and robust construction. Also suitable for preparation phases before the dive and for signaling presence at the surface during spearfishing and freediving activities.
Star Double Braid Rope for Freediving and Spearfishing
The Star rope is a pre-stretched double braid rope, designed to deliver maximum durability and reliability for freediving and spearfishing applications. Its soft, flexible construction ensures the rope remains easy to handle and does not stiffen over time, maintaining its performance even after prolonged use.
Technical Features
- Material and Strength: high abrasion resistance, ideal for underwater environments that require mechanical reliability.
- Very low stretch: ensures stability and precision, especially important as a guide line for open-water freediving training and competitions.
- Available diameters: 10 mm with a breaking load of 2450 daN, 12 mm with a breaking load of 3300 daN.
- Color: white, excellent visibility in underwater environments.
- Lengths: available in 50 and 100 meters depending on operational requirements.
Applications
The Star rope is ideal for specific freediving and spearfishing applications such as:
- Support halyards and sheets
- Topping lifts and progress-capture tackle systems
- Redirect systems
- Guide lines for training and competitions
- Combined use with counterweights or variable-weight sleds
Technical Advantages
The pre-stretched double braid construction provides reduced elasticity, resulting in direct, controlled force transmission during descent and ascent. The rope’s softness ensures excellent handling without sacrificing strength, while its abrasion resistance extends service life even under frequent contact with rough surfaces or underwater equipment.
Atolls: Safety and freediving
In freediving, line training requires a fixed, stable, and highly visible surface reference point that the freediver can hold onto before the dive, use to recover energy between breath-holds, and attach ballast for FIM (Free Immersion). This role is fulfilled by the freediving atoll: a storage buoy designed to withstand intensive use in open water and in the pool, with clearly defined structural features that distinguish it from simple diver-down marker buoys intended for spearfishing.
The Atolls category at Deep Blue includes complete atolls, replacement inner tubes, and accessories such as lines, bottom plates, flags, and flag holders. The products available meet the needs of both individual freedivers training on their own and freediving schools and clubs that require rugged, long-lasting equipment for group sessions.
Types of products in the category
The range is divided into three main macro-categories, each with distinct functions within the same activity.
Complete atolls: this is the ready-to-use configuration. They allow the atoll to be inflated immediately and put in the water without purchasing additional components. This type includes the Apneautic models, available in Standard and Large versions, and the C4 Tavolara Buoy, a storage atoll with a construction approach focused on high-quality materials.
Atolls without inner tube and replacement inner tubes: the structures are sold separately. This configuration is intended for users who already own a compatible shell or inner tube and want to replace or add only one of the two parts, or for those who prefer to choose the inner tube independently based on the desired volume and valve.
Atoll accessories: the catalog includes removable diver-down flags in short and long versions (Best Divers) and flag holders compatible with Mares atolls, ropes, and bottom plates. These components allow users to maintain and customize the atolls they already own.
Ropes and bottom line systems for freediving
Bottom lines are among the most technical products in the category. The Star Rope and the Prorope Rope, produced by Deep Blue, are lines designed to withstand the stresses typical of repeated underwater use. Available in multiple length options, they pair with the Mares bottom line plate and the Apneautic bottom line ballast strap, components that stabilize and weight the line in its vertical position during depth dives. These systems are used in depth training and guided freediving disciplines, where the straightness of the descent and the stability of the vertical path depend on the quality and correct ballasting of the rope.
How to choose a freediving atoll
The choice of atoll depends on several technical parameters and the intended use. Here are the main criteria to consider.
Size and buoyancy: the Standard version (600 mm diameter, 45 liters internal volume) is suitable for a single freediver training in FIM or STA (static apnea) without the need to load very heavy ballast. The Large version (700 mm, 70 liters) offers greater buoyancy, suitable for those using significant ballast for neck weight or dynamic ballasting, or for group sessions where several people hold onto the same surface buoy.
Storage compartment: all Apneautic atolls and the C4 Tavolara Buoy are equipped with a central compartment with lid. The compartment volume (10 liters for the Standard version, 16 liters for the Large) determines how much rope can be stored inside: Apneautic atolls are designed to accommodate 10 and 12 mm diameter ropes up to 100 m long. This aspect is important for open-water training at considerable depths.
Inflation valve: the Apneautic inner tube with included valve is compatible with its own atolls, while the Omer inner tube is specific to that brand’s Boa Atoll model. Checking compatibility before purchase is essential to ensure proper sealing and correct inflation pressure.
Portability and transport: the C4 Tavolara Buoy comes with a polyester carry bag, which makes transport easier and protects the buoy between sessions. Once deflated, Apneautic atolls can be folded, but the rigidity of the PVC requires adequate storage space.
Materials and technical features
The products in this category feature construction solutions specifically designed for use in marine environments and in the pool.
Main fabric – PVC-coated polyester: this is the dominant material in Apneautic atolls and in the C4 Tavolara Buoy. The polyester structure provides mechanical strength and dimensional stability, while the PVC coating ensures waterproofing and fast drying of the outer surface. The material does not absorb water, a feature that reduces weight during recovery and transport.
Impregnated nylon reinforcement bands – C4 Tavolara Buoy: the Tavolara incorporates reinforcement bands made of woven nylon impregnated with water-repellent material. These bands absorb mechanical stress at attachment and load-distribution points, such as the D-rings and handle connections.
PES straps and handles: on Apneautic atolls, the side straps and lower strap are made of PES (high-tenacity polyester). These serve as handles for the freediver at the surface, while the lower one is equipped with stainless steel D-rings for connecting ballast.
YKK zippers: YKK zippers are recognized in the industry for their resistance to prolonged use in wet and salty environments.
Drain holes: two circular holes in the lower part of Apneautic atolls allow any water that may have entered the structure to drain quickly, maintaining stable trim and reducing the overall weight of the buoy in the water.
Telescopic diver-down flag: atolls in complete versions or with a specific accessory are compatible with removable diver-down flags. The telescopic system on the C4 Tavolara and the side housing on Apneautic atolls allow the flag to be mounted and removed quickly. The Best Divers flags available in this category are offered in short and long versions, with a removable pole for transport.
Bottom lines: Star Rope and Prorope Rope are built with multi-filament structures specifically selected to resist wear from contact with salt water and to maintain vertical tension without excessive twisting. The line ballast—made with lead elements or strap systems—must ensure the rope remains perpendicular to the surface, a necessary condition for proper free-descent training.
Practical use
Open-water line training: the atoll is anchored to the bottom using a rope and ballast. The freediver holds onto the side handles at the surface to perform recovery breathing and pre-dive preparation, and the descent takes place vertically along the line. The storage compartment holds the coiled rope, which pays out progressively during the descent. This system eliminates the need to hold the rope by hand or rely on external structures, allowing the freediver to focus on the dive.
FIM – Free Immersion: in FIM, the freediver pulls along the line using the hands, both during descent and ascent. The atoll must provide a solid attachment point and enough buoyancy to compensate for the freediver’s weight during recovery. Large models, with internal volume up to 70 liters, are particularly suitable for this type of dive.
Group sessions and freediving schools: in freediving schools and clubs, atolls are used to manage multiple freedivers around the same dive station. Stability in the water and the visibility provided by the diver-down flag are critical factors for group safety.
Pool sessions: some atolls are also used in the pool for DNF (Dynamic No Fins) or DYN training, attaching the buoy to a lane as a reference and recovery point. In this context, zipper durability and stable trim in flat water are key.
Surface signaling: the diver-down flag mounted on the atoll signals the presence of people in the water to surface navigation. The Best Divers flags available as separate accessories allow users to upgrade or replace the flag on atolls from different brands.
Available brands
Apneautic is the most represented brand in this category, with four main references: atolls in Standard versions (600 mm diameter, 200 mm height, 45 liters internal volume, 10 liters storage compartment) and Large versions (700 mm diameter, 230 mm height, 70 liters internal volume, 16 liters storage compartment), available in yellow and red, both complete with inner tube and in shell-only versions. Apneautic also produces the replacement inner tube with valve. The brand has established a significant presence in the freediving sector, with products appreciated by competitive freedivers and freediving schools.
C4 is present with the Tavolara Buoy, an atoll with an 80 cm diameter and 18 cm height, built from 850 gsm PVC with a thickness of 0.7 mm, nylon reinforcement bands, YKK zipper, four side handles, and stainless steel D-rings. The Tavolara is double-chambered and comes with a polyester carry bag and semi-rigid flag included.
Mares is present with the Red Freediving Atoll, a storage atoll for freediving, and with two specific accessories: the atoll flag and the atoll flag holder, modular components compatible with its own models.
Best Divers supplies two models of removable diver-down flags: the short version and the long version, both with a removable pole for easier transport and storage.
Conclusion
The Atolls category at Deep Blue covers the needs of those who practice apnea and freediving with a structured approach to line training, from individual open-water sessions to organized activities at freediving schools. The available products stand out for their use of proven technical materials and for a design that takes real-world conditions into account: high buoyancy, fast drainage, spacious storage compartment, and integration with diver-down flags for open-water safety.
Brands such as Apneautic, C4, and Mares offer solutions for different levels of experience and different use contexts, along with the option to purchase separate components for maintaining and customizing the equipment over time.
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