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The PADI Delayed Surface Marker Buoy (DSMB) Diver Specialty course is designed for divers who want to enhance their safety and communication skills while diving. Using a DSMB is crucial for signaling your position to boats and support teams on the surface, especially during safety stops or when surfacing from a dive. This course provides divers with the knowledge and practice needed to effectively deploy and manage a DSMB, ensuring increased safety during any dive.


Course Aims and Structure

The aim of this course is to equip divers with the skills to confidently and safely use a DSMB in various diving conditions. Through theoretical learning and practical application, participants will become proficient in the use of DSMBs.


Knowledge Development

The course starts with a knowledge development session that covers the different types of DSMBs and reels, their purposes, and the situations in which they are most effectively used. Participants will learn about the importance of DSMBs in diver safety, surface communication, and how to manage potential problems associated with their use.


Practical Application

The practical aspect of the course includes two open water dives, where divers will practice deploying a DSMB from different depths and situations. Skills covered include:

  • Choosing the correct DSMB and reel for the diving conditions.
  • Properly preparing and securing the DSMB and reel before the dive.
  • Techniques for deploying the DSMB safely and efficiently.
  • Managing the reel and line to prevent entanglement.
  • Ascending while controlling the DSMB and maintaining proper buoyancy.



Upon successful completion of the course, participants will receive the PADI Delayed Surface Marker Buoy Diver Specialty certification. This certification acknowledges your ability to safely and effectively use a DSMB, enhancing your safety and communication capabilities during dives.

Delayed Surface Marker Buoy (DSMB) Diver

  • What's Included

    • All knowledge development materials including eLearning or a manual
    • A classroom session to prepare you for your open water dives
    • Kit hire
    • Two open water dives, completed over one day
  • Course Requirements

    • Be at least 12 years of age
    • Be at least a qualified PADI Open Water Diver
    • Be in good physical health
    • Completed medical form (Click here)
    • Agree to our terms and conditions (Click here)
  • What's Next?

    If you’re interested in becoming a Delayed SMB Diver, you might also be interested in our Drysuit Speciality (here), Wreck Speciality (here) or Boat Diver Speciality (here).

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