Best Surface Marker Buoys for Scuba Diving
March 30th, 2026
Best Surface Marker Buoys for SCUBA Diving
Published April 2026 | Author: Jamie Ayliffe
An essential, yet often over-looked, piece of equipment for any Scuba diver is the Surface Marker Buoy (SMB), also known as the safety sausage. SMBs are brightly colored, inflatable tubes which are designed for high visibility, marking a diver's location while they are underwater. SMBs are not just gear; they are vital communication tools that alert others to your presence, signal your ascent, and enhance safety in busy waters. The answer to the question "Should I bring an SMB?" is always YES! The ocean is beautiful yet unpredictable, and SMBs offer peace of mind, allowing you to explore underwater wonders confidently.
At Bluewater, we place great importance on education and ensuring our divers are well-informed about their purchases. Therefore, before we introduce our top Surface Marker Buoy selections, let's explore the critical factors to keep in mind when investing in your new SMB.
Design:
Open-ended vs Closed-ended
Open-ended surface marker buoys (SMBs) have a simple design with a single open end for quick inflation using a regulator purge, allowing for easy filling even at depth. The open end, situated at the lower part of the SMB, remains submerged to prevent air loss, making it ideal for calm waters. It is crucial to keep the line connected to the buoy taut while diving to avoid air escaping from the bottom. Modern designs often incorporate self-sealing ends or check-valves to prevent deflation on the surface.
On the other hand, close-ended (or closed-circuit) SMBs are completely sealed with no openings. These SMBs can be inflated using an oral inflation valve or a low-pressure air supply similar to a dry suit or the LPI connected to your BCD. An over-pressure/release valve is installed to prevent the buoy from tearing due to expanding gas during ascent. Close-ended SMBs are better suited for rougher conditions.
On the other hand, close-ended (or closed-circuit) SMBs are completely sealed with no openings. These SMBs can be inflated using an oral inflation valve or a low-pressure air supply similar to a dry suit or the LPI connected to your BCD. An over-pressure/release valve is installed to prevent the buoy from tearing due to expanding gas during ascent. Close-ended SMBs are better suited for rougher conditions.
Color:
SMBs are available in a variety of vibrant neon colors that enhance visibility above the water. Traditionally, SMBs are commonly seen in bright orange, red, or yellow; however, contemporary designs now offer options in pink, white, and green . This allows divers to personalize their equipment while ensuring easy identification from a distance.
When selecting a color for your SMB, it is crucial to consider the significance of colors in different regions. While red and orange are conventional choices, the color yellow can sometimes indicate an emergency or distress signal.
Additionally, many SMBs include safety features like reflective tape or reflective writing, such as the phrases "diver below." These additions significantly improve visibility, making it easier for divers to be seen in various conditions.
When selecting a color for your SMB, it is crucial to consider the significance of colors in different regions. While red and orange are conventional choices, the color yellow can sometimes indicate an emergency or distress signal.
Additionally, many SMBs include safety features like reflective tape or reflective writing, such as the phrases "diver below." These additions significantly improve visibility, making it easier for divers to be seen in various conditions.
Size:
The size of surface marker bouys does matter. While smaller buoys (~1m / 3.3ft) are more lightweight and convenient to handle, store and inflate, larger buoys (1-2m+ / 3.3 - 6.6ft +) offer increased visibility to boat traffic, especially in challenging weather conditions. Your selection should be based on the diving location and the nature of your diving activity.
Here are our TOP Surface Marker Buoy picks for you:
Best Budget-Friendly SMB
The Cressi Club HD SMB presents an excellent option for budget-conscious divers. Crafted with heavy-duty materials, this professional-grade surface marker buoy offers enhanced visibility and reliability across various diving environments. Constructed from resin-coated nylon and featuring heat-welded polyurethane injection, the buoy ensures long-lasting durability and exceptional performance. Despite its robust design, the SMB remains user-friendly and straightforward to operate.
Special features include:
- Heavy-duty resin-coated nylon construction
- Easy inflation using a scuba regulator
- Stable lead-weighted base for vertical positioning
- Comapact and portable rollable design with elastic band closure
- High visibility color with ABS caribinar for added safety
- Size: 120 cm (47 1/4 in) length x 15 cm (5 7/8 in) wide
- Available colors: high-visibility orange
Best SMB for Entry Level divers
The TUSA Rescue Marker / SMB is an indispensable asset for divers at any skill level. Its user-friendly design makes it an exceptional choice for novice divers who are becoming acquainted with SMBs. This buoy is compact, reliable and very easy to use. Its vivid color ensure high visibility.
What makes this a great choice?
- Safety tube inflation using a scuba regulator
- Secure check valve which ensures no accidental release of air
- Inflator/deflator valve, ensuring effortless inflation and deflation
- Highly visible with its bright neon color design
- 'Diver below' writing in reflective tape
- Size: 180 cm (71 in) length x 13 cm (5 in) width
- Available olor: pink
Best SMB for Divers to Level Up
The Apeks DSMB is designed for divers ready to advance their skills. With a single-breath inflation system for easy deployment, SOLAS reflective panels for high visibility in rough conditions, and brass eyelets for attaching accessories or using as an emergency float, this SMB offers reliability and convenience. Perfect for boosting confidence and conquering greater diving challenges.
Why choose this SMB?
- Oral inflation valvue for easy inflation using single breaths
- SOLAS reflective tape on BOTH sides for maximum visibility
- 2 x Brass eyelets for attatching accessories or using it as a float
- Strong and reliable construction due to heat-sealed edges
- Compact and Easy to stow with a bungee closure system
- Size: 140 cm (55 in) length x 15 cm (6 in) width
- Available colors: orange and yellow
Best SMB for Advanced Divers
The Halcyon Alert Marker buoys are a great purchase because they make divers highly visible on the surface and can provide extra lift in emergencies. They are built from tough nylon with welded seams, ensuring they last and hold up well in tough conditions. They have a special No-Lock connecter, making them easy to use and inflate, and even better for advanced divers! With a variety of sizes and colors, there is a Halcyon Buoy for all diving occasions.
Fantastic features of this SMB:
- Closed-circuit design, meaning no accidental air loss
- No-Lock oral/LP Hose inflate mechanism
- Overpressure release valve
- Packs perfectly into Halcyon BCD pockets
- SOLAS reflective tape for even greater visiblity (on the larger sizes)
- Available colors: orange, yellow and pink
Size options:
- Standard (3.3' / 1m)
- Big (4.5' / 1.4m)
- Super big (6' / 1.8m long and 25 cm wide)
- Super slim (6'6'' / 1.8m long and 15 cm wide)
Best All-in-One SMB
Crafted from durable PVC, the Mares Diver Marker Buoy All-in-One stands out as a reliable choice.. What sets this SMB apart is its integrated reel, neatly stored in a mesh pocket, along with a robust stainless steel snap hook for easy attachment. All you need, in one place. Enhanced by its vibrant coloration and 'diver below' sign, this SMB ensures excellent visibility.
Highlight features of this SMB:
- Extremly lightweight and compact
- 20m / 60 ft reel and snap hook included
- 5 cm / 2" reflective solar band
- Reflective writing for added safety
- Can be inflated by both oral inflation and regulator purging
- Size: 180 cm / 71 in in length
- Available color: bright orange
How to care for your Surface Marker Buoy
After each use, make sure to rinse your SMB with fresh water, paying attention to thoroughly clean the inside of the nozzle when possible. To help maintain its quality, remember to dry it entirely in a shaded area, avoiding direct sunlight if you can. When storing, it's best to keep it loosely rolled in a cool, dry place. Before your next dive, don't forget to inspect the valve and inflator for any leaks, and check for any signs of wear near the attachment points. These simple steps will help keep your SMB in top condition for your future dives.
Reels for your SMB
Have you found the perfect SMB for your diving adventures? That's fantastic!
When choosing a reel, consider the depth of your dives and the frequency of SMB deployment.
When choosing a reel, consider the depth of your dives and the frequency of SMB deployment.
Remember, the deeper you go, the more reel line length you'll require to ensure a hassle-free experience.
FAQs about Surface Marker Buoys
The main differences between SMBs (Surface Marker Buoys) and DSMBs (Delayed Surface Marker Buoys) comes down to usage and timing. SMBS are typically infaled at the beginning of a dive and towed by the diver throughout, making them ideal for shore entries, shallow dives and training dives. On the otherhand, DSMBs are deployed at the end of a dive to signal the safety stop or ascent. Preferred for boat dives, deep dives and currents, DSMBs can be conveniently tucked into pockets or clipped onto D-rings when not in use.
Here is a step-by-step guide to deploy your DSMB underwater. Please note that this is purely a guideline, and additional training is always a great idea for handling an DSMB.
1. Unroll your DSMB, ensure that your reel is not tangled.
2. Achieve neutral buoyancy at your safety stop depth, or required depth.
3. Inflate your DSMB using one of the three methods:
- Alternate Air Source: Purge your octopus into the open-end of your DSMB
- Oral inflate: One breath at a time, blow into the oral inflation valve by pushing down onto the end of the nozzle and exhaling.
- Low-pressure inflator- disconnect your LPI from your BCD and attach/push it onto the DSMB nozzle and purge air until it is inflated.
4. Launch: Release your DSMB, ith your finger in the reel, holding the line taut until it reaches the surface. DO NOT attach the DSMB to your BCD and do not hold the reel too tight.
For many training agencies, SMB skills are a requirement. Although you may not have been taught these skills in your dive course, it is recommended to acquire the specific knowledge to handle SMBs safely and effectively. If done incorrectly, it could potentially be hazardous, such as entanglement in the ropes or rapid ascent. Many training agencies, such as PADI or SSI, should be able to assist you in this training.
All of the above Surface Marker Buoys and reels can be found on our online store. Still don't know which one is for you? Feel free to email our team of experts at scuba@bluewaterphotostore.com
Meet our expert
Jamie Ayliffe
Born into a family of SCUBA instructors and dive shop owners in South Africa, Jamie has been diving for 19 years and has accumulated over 2000 dives under her weight-belt. Following in her family's footsteps, Jamie is a SCUBA instructor who has explored many stunning dive sites across the globe and overseen dive operations in various locations.
With a degree in Ichthyology (fish) and Zoology, she has a strong passion for the underwater environment and marine conservation. She is equally passionate about sharing her love for diving, and dive gear, with fellow SCUBA enthusiasts.
With much experience in handling and upkeeping SCUBA gear, Jamie has a strong understanding of dive equipment functionality, individual diver necessities, and the latest trends in the diving industry. She is eager to share her insights with you!
