Delayed Surface Marker Buoy Course

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Why train with us?

  • Our retail centre is located on Queen Street in Leslieville, Toronto.

  • Our training pool is only 1km from our retail centre in Leslieville.

  • Our Caledon training pool is located at Southfields Community Centre Pool, 225 Dougall Avenue, Caledon, L7C 3M7

  • We are a PADI 5 Star Dive Centre, offering the full PADI range of courses.

  • Classroom and eLearning options.

  • We have our own in-house TICO certified travel agency, ScubaGetaway.

  • We teach children 10 years and older.

  • Diving courses available year-round.

  • Private courses available.

  • Passionate team of Instructors and Divemasters who love to teach.

The PADI DSMB Diver specialty course with TSC takes place at either Gulliver’s Lake or Humber Bay Park West. It can also be combined with the Advanced Open Water course.

Course Description

The PADI DSMB specialty course teaches students how to use and deploy a delayed surface marker buoy from depth using a diving spool or reel. This is one of the most important skills for independent divers, to mark their location during a safety stop prior to surfacing. It also aids in safety when diving in areas with boat traffic. As a PADI specialty course, it counts towards the Master Scuba Diver rating.

What You Will Learn

Students will learn how to attach their DSMB to their spool and fill the DSMB using a variety of methods, including with their regulator exhaust, using their octo, using their LPI, and more. Students will also practice swimming underwater while towing the DSMB.


The PADI DSMB course with PADI includes 2 open water dives that take place in one day. As a continuing education course, students must have their own mask, snorkel and fins. They must also have a DSMB and spool with at least 15 meters of line (which can be purchased from TSC). The rental of BCD and regulators are available if needed from the sign up menu. Tank and weights are included with the course fee.

Advanced Open Water Linking

If you are taking the Advanced Open Water course with TSC, inquire about doing your DSMB specialty concurrently. Both courses can usually be completed on the same weekend.