PADI DSMB Speciality



Get yourself ready for a great season of UK diving with our March special offer. Join us at Capernwray on the 28th of March and receive 20% off your course 

The DSMB (Delayed Surface Marker Buoy) is probably one of the most important pieces of kit a diver can carry with him/her. Deploying a DSMB towards the end of every dive alerts boats and surface cover to your location, allowing you to surface safely at the end of your dive.

Many divers would never dream of diving without a Delayed Surface Marker Buoy (DSMB) and in some locations around the world it’s considered required safety equipment. Knowing how to deploy and manage a DSMB are valuable skills learned in this course.


Boats and currents are two common factors associated with many dive sites. Boaters don’t always recognize that divers are in the area and current can carry you further than expected. Launching a delayed surface marker buoy (DSMB) before you surface can alert others to your location in advance of your ascent. Adding another layer of safety, you can also use the DSMB line to complete your safety stop, which is advantageous in a current or when there are no other visual references. Take this course to learn about all the beneficial uses of a DSMB.


Marker buoys serve a range of purposes and you’ll learn about common types of DSMB along with the reels used to control them. During the two training dives, you’ll practice:

  • Preparing and stowing your DSMB and reel.
  • Deploying the DSMB from a stationary position and from mid-water.
  • Swimming while towing a DSMB and managing the reel and line.
  • Making a safety stop using the DSMB line.


You need to be a PADI Open Water Diver who is at least 12 years old to enrol in the DSMB Diver course.

The Scuba Gear You'll Use

Besides your basic scuba equipment and thermal protection you will need a cutting device, reel and DSMB. You can select your own reel and DSMB from the selection we offer HERE or simply add the reel and DSMB package to your course above which includes the APEKS 30m FINGER SPOOL and SCUBAPRO SMB 4.5’ 210D

Your Next Adventure

Now you know how to safely deploy and manage a DSMB you can safely expand your diving options and experience the great diving we have on our door step here in the UK. If you haven’t already dived in a drysuit then the PADI Drysuit speciality is a perfect course to take to ensure you have the proper exposure protection, meaning you are warm and comfortable on every dive. To see some of the great trips we offer follow this link to take the plunge into the great salty world around the UK