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Surface Marker Buoys (SMBs)

A Surface Marker Buoy (SMB) is absolutely essential kit for diving anywhere you may have surface boat traffic. A SMB allows your position to be known by people watching from shore and watercraft, whether they be the boat you are diving from or other water users.

Delayed SMBs, such as the AP Diving Buddy SMB, are designed to be deployed from depth near the end of, or at any critical point during, a dive. Some divers prefer to shoot their Delayed SMBs from the bottom. Other diver shoot from mid-water when they start their safety stop, or decompression stops. We strongly recommend you have a Delayed SMB and reel/spool with you on every dive. On open water dives, waiting until you surface to deploy a surface only safety sausage is dangerous in high boat traffic areas.

Which colour SMB should you buy

There are essentially three choices for SMB colouring - all Red, all Yellow, or Red and Yellow on contrasting sides.

Studies have shown that Red and Yellow are the two most visible colours at sea. But each colour works better than the other in different conditions. Thus if you look around a dive shop, you will see up to three SMB colours: all Red; all Yellow; and one side Red, one side Yellow.

Recreational Diving

An all Red SMB is far and away the most common SMB colour. This leads some new divers to buy an all Yellow SMB so theirs will stand out more when at a busy dive site. We don't recommend this.

Other divers buy the two-colour SMBs (Red on one side, Yellow on the other side) because these must surely be the ideal for high-visibility over the widest range of conditions. For recreational diving, especially when ocean diving, this is what we recommend. However, it is essential that you let your surface cover know that your combined Red and Yellow SMB is not being used as an emergency signal unless an emergency signal or message is attached to it.

Advanced/Technical Diving

In Australia, and many other parts of the world, there is a convention used by more advanced and technical divers that an all Yellow SMB is an emergency signal, to be responded to by sending down a cylinder of gas, or a rescue diver, or both.

Whilst for the most part recreational divers do not have or need such a signal, it is possible for both types of diver to be on the same dive site. If one group of divers is using Yellow as an emergency signal and the other group uses Yellow as standard, this could lead to confusion and even to a genuine emergency signal being ignored.

For this reason, unless you have a very strong reason for wanting an all Yellow SMB as standard, please don't buy one.

If you decide that you would like to use a Yellow SMB as an emergency signal yourself, two precautions to take are:

  • Make sure your surface cover knows this convention
  • Mark the SMB with "EMERGENCY", "HELP", "SOS" or some other such message in large, clear black letters to ensure there is no doubt that you are a diver in distress and not just a diver who thought a Yellow SMB looked nicer than a Red one.


Product Image Item Name- Price
AP Diving Buddy Delayed SMB with Mini-Cylinder Inflation - SMBCi

AP Diving Buddy Delayed SMB with Mini-Cylinder Inflation - SMBCi

The superb Buddy Self-sealing Delayed SMB with mini-cylinder inflation from AP Diving A real gem of a product, the Buddy SMBCi has all the features...
$375.00  $295.00
Save: $80.00 (21%)


... more info

AP Diving Buddy Pocket Reel and Delayed SMB Package

AP Diving Buddy Pocket Reel and Delayed SMB Package

This package combines the small and compact Buddy Pocket Reel with the Buddy Self Sealing Delayed SMB . This is the best combination on the market....
$245.00  $185.00
Save: $60.00 (24%)


... more info

AP Diving Buddy Self-Sealing Delayed SMB

AP Diving Buddy Self-Sealing Delayed SMB

The original AP Diving Buddy Self-Sealing Delayed Surface Marker Buoy Closed (SMBC - SMB Closed). Much copied but never bettered. A high visibility...
$105.00  $85.00
Save: $20.00 (19%)


... more info

AP Diving Training Delayed SMB

AP Diving Training Delayed SMB

A must have for all dive instructors the AP Diving Training Delayed Surface Marker Buoy (SMB) is identical in design to the rest of the AP Diving...
$125.00  $99.00
Save: $26.00 (21%)


Buy Now

AP Diving Buddy SMBCi Easifil Inflator Hose Adaptor

AP Diving Buddy SMBCi Easifil Inflator Hose Adaptor

The Buddy AP35P Easifil Inflator Hose Adaptor for SMBCI is for use with an APSMBCi - Surface Marker Buoy with inflation. The AP35P is an alternative...
$75.00  $60.00
Save: $15.00 (20%)


Buy Now

Best Divers Deco Pocket Set - SMB and Reel

Best Divers Deco Pocket Set - SMB and Reel

The Best Divers Deco Pocket Kit comes with a SMB, finger spool reel, stainless steel double-ended snap bolt and a leg pocket to keep it all in. The...
$57.50  $46.00
Save: $11.50 (20%)


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Divesoft SOS Kit

Divesoft SOS Kit

The Divesoft SOS-kit is a set of tools that every diver should have at hand when diving in open water and in currents or in places where currents can...
$255.00  $239.00
Save: $16.00 (6%)


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IST Proline Delayed Surface Marker Buoy (SMB) in Pouch

IST Proline Delayed Surface Marker Buoy (SMB) in Pouch

This package combines an IST Proline Delayed Surface Marker Buoy (SMB) with a handy Storage Pouch. All divers are supposed to carry a Surface Marker...
$65.00  $50.00
Save: $15.00 (23%)


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Northern Diver Delayed SMB 1.8 metre "Diver Below"

Northern Diver Delayed SMB 1.8 metre "Diver Below"

The Northern Diver Delayed Surface Marker Buoy (SMB) is a 1.8 metre long 'tube' style DSMB, featuring an over inflation 'auto' dump valve (which can...
$162.00  $133.00
Save: $29.00 (18%)


... more info

OMS Delayed SMB (Yellow) - 13 kg Lift (EMERGENCY wording)

OMS Delayed SMB (Yellow) - 13 kg Lift (EMERGENCY wording)

OMS Emergency Delayed Surface Marker Buoy (SMB) with 13 kg (30 lb) lift capacity. Length is 157 cm (5'2"). Yellow in colour for maximum visibility,...
$75.00  $69.00
Save: $6.00 (8%)


Buy Now


Featured Products - Lift Bags / Reels / SMBs

AP Diving Buddy Self-Sealing Delayed SMB

AP Diving Buddy Self-Sealing Delayed SMB
$105.00  $85.00
Save: $20.00 (19%)
AP Diving Buddy Pocket Reel and Delayed SMB Package

AP Diving Buddy Pocket Reel and Delayed SMB Package
$245.00  $185.00
Save: $60.00 (24%)

Monthly Specials For August

AP Diving Buddy Self-Sealing Delayed SMB

AP Diving Buddy Self-Sealing Delayed SMB
$105.00  $85.00
Save: $20.00 (19%)

Northern Diver Delayed SMB 1.8 metre "Diver Below"

Northern Diver Delayed SMB 1.8 metre "Diver Below"
$162.00  $133.00
Save: $29.00 (18%)
Best Divers Deco Pocket Set - SMB and Reel

Best Divers Deco Pocket Set - SMB and Reel
$57.50  $46.00
Save: $11.50 (20%)

AP Diving Buddy Pocket Reel and Delayed SMB Package

AP Diving Buddy Pocket Reel and Delayed SMB Package
$245.00  $185.00
Save: $60.00 (24%)
AP Diving Buddy SMBCi Easifil Inflator Hose Adaptor

AP Diving Buddy SMBCi Easifil Inflator Hose Adaptor
$75.00  $60.00
Save: $15.00 (20%)
Divesoft SOS Kit

Divesoft SOS Kit
$255.00  $239.00
Save: $16.00 (6%)

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