Diver on the bottom inflating an orange delayed surface marker buoy

Delayed Surface Marker Buoy (DSMB) Diver

Name: Delayed Surface Marker Buoy (DSMB) Diver
Brand: PADI
SKU: SMB001
Price: 3500.00 ZAR
Availability: InStock

SKU SMB001

R 3,500.00

Product variants

Sending a buoy up from depth looks trivial. It's the skill that most often goes wrong.

A delayed surface marker buoy is how you tell the boat where you'll surface before you get there. On a drift dive, in traffic, or anywhere with a current, it's the difference between being collected and being looked for. Every experienced diver carries one.

Deploying it is where things go wrong. A DSMB goes up fast, taking a line with it, and if a finger, a fin or a piece of kit is caught in that line as it goes, you go up with it. An uncontrolled ascent from depth is a genuine emergency, and it's an entirely avoidable one.

The PADI DSMB Diver course drills a clean deployment until it's automatic. Reel and spool handling, controlling the line, managing your buoyancy while your hands are busy, and doing all of it while holding a stop. Two dives with an instructor, and all scuba equipment is included.

What DSMB Diver Gives You

You'll come away able to select and prepare a DSMB and reel, deploy it cleanly from depth without losing your position or your buoyancy, and handle the things that go wrong: a tangled line, a stuck spool, a buoy that doesn't inflate properly.

It's a short course, and it's one of the most disproportionately useful on the list. If you dive off boats, in current, or anywhere the surface isn't guaranteed to be empty, this is basic competence rather than a nicety. It also counts toward your Master Scuba Diver rating.

Ready to deploy properly? Book DSMB Diver below, or get in touch with our team to talk it through.

What This Course Entails

Knowledge development covers why and when to use a DSMB, the different styles of buoy and the reels and spools that go with them, how to prepare and stow one so it's ready when you need it, and the risks involved in getting a deployment wrong.

The in-water work is all about clean technique: inflating from depth, controlling the line as the buoy rises, keeping your buoyancy and your position while your hands are occupied, and reeling in afterwards without a tangle. You'll also work through the failures, including a snagged line and a spool that jams.

Two open water dives at a recommended 9 to 12 metres put it together. All scuba equipment is included for the duration of the course.

Prerequisites

Certified PADI Open Water Diver, or a qualifying certification from another training organisation.
Minimum age is 12 years old.
Complete a basic health screening questionnaire to confirm you're fit to dive.

Frequently Asked Questions

Why would I need a course to use a DSMB?

Because deploying one from depth is where divers get hurt. Get a finger or a fin caught in the line as the buoy goes up and you get an uncontrolled ascent, which is a genuine emergency. The course drills a clean deployment until it's routine, which is precisely the point.

What's the difference between a DSMB and a normal SMB?

A surface marker buoy is inflated and towed at the surface. A delayed surface marker buoy is sent up from depth, usually near the end of a dive, to tell the boat where you'll surface before you get there. The delayed deployment is the skill, and it's what this course is about.

What are the prerequisites for the DSMB course?

A PADI Open Water Diver certification and a minimum age of 12. No previous experience with reels or buoys is assumed, which is just as well, since improvising with them is exactly how people get into trouble.

How many dives does the DSMB course involve?

Two open water dives, at a recommended depth of 9 to 12 metres, plus the knowledge development. It's a short course with an outsized safety payoff, particularly if you dive off boats or in any current.

Do I need my own DSMB and reel?

Not for the course, everything is provided. That said, this is a piece of kit worth owning and knowing intimately, so we'll talk you through the different buoy and reel styles during the course and help you pick one that suits how you dive.

Are air fills included in the course price?

No, and that is deliberate. Air is charged as you use it, per fill, and invoiced to you after your session. Every diver breathes differently, and building a worst-case air allowance into every course fee would mean the lightest breathers subsidising the heaviest, so instead you pay for the air you actually use and the course price stays lower for everyone. We confirm the current fill rate with you when we book your dates, and you are welcome to ask us for it at any point before that. Dive site entrance fees are also paid separately, at the site on the day.