Delivery to UK Mainland from £2.50
  • PayPal
  • Visa
  • Mastercard
14 Day Refunds & Return Policy

DSMB (Delayed Surface Marker Buoy)

  • Colour: Orange
    £44.00 inc VAT

Enquire about this product


1.3m tube style delayed surface marker buoy, featuring an over-inflation automatic dump valve (which can also be operated manually).

Incorporates a weighted opening, self-sealing base and webbing attachment strap.

Also features an inflation tube, which allows the buoy to be inflated orally or via a low pressure inflation hose.


  • 1.3m long
  • Manual/auto over-inflation dump valve
  • Self-sealing and weighted opening
  • Oral/LP hose inflation tube
  • Attached webbing strap with stowage section (secured with hook and loop patches)

Delivery, Returns & Instore Collection

When will I receive my order?

International Delivery Times

Monday – Friday 3 – 5 Working Days

UK Mainland Delivery Times

Monday – Friday before 2pm Next Working Day
Monday – Friday after 2pm 2 Working Days
Saturday & Sunday 2 Working Days

UK Extended Areas Delivery Times

Monday – Sunday 3 – 5 Working Days

Please note delivery times may be extended during busy periods.

EU Areas

Please note that due to changes by HMRC, orders being shipped to EU countries will not be shipped on the same day as they are invoiced. EU Orders will now be shipped on the next working day. This only applies to E.U. orders. Domestic and Worldwide shipments remain the same.

Collect In Store?

When you go to the online checkout, you can opt to collect your items in store. We'll let you know when your order is ready for you to collect. Your order will normally be ready to collect the next working day.

Returns, refunds or exchanges?

You can return any item within 28 days of receipt for a refund, provided the item is unused, in its original packaging and in 'as new' condition.

Items will be refunded in full (less postage) if received within 28 days from the date of despatch.


We aim to deal with all returns and exchanges on the day they arrive, however please allow longer during peak periods.

You can return the item(s) by dropping them off in store or by returning the item(s) by post. We do not insist on a specific courier service for the return, so please use the most economical or appropriate method for returning the item(s).

Northern Diver (Int) Ltd
Appley Lane North
Appley Bridge

If an item becomes faulty after a period of time then please contact customer services (01257 254 444 or prior to returning the item. We will either repair or replace the item at our discretion.

Tell Us What You Think

Customer Reviews

4.8 out of 5 Stars (4 reviews)

Write a Review

Amazing Value for Money

By Rob on 19 Dec. 2015

This is the best SMB sausage I have owed or used. Compact in your pocket but easily inflates to an easy to see size. The dump valve makes emptying and rolling away easy and the low pressure inflator works without an issue. Top marks for this one ND. Thanks.


By Bernard Perrier on 30 Jun. 2016

Very handy and practical SMB. Does not need much air to inflate either by octopus or direct feed. One important thing is to rinse it thoroughly deployed, much more when it is kept as an emergency, as it is carried underwater always closed, but treat it as if it has been used by rinsing it open. Talking by experience.

Northern Diver dSMB

By SCUBA Magazine on 23 May. 2017

Easily stowed away in a pocket, this functional all-rounder is suitable as a main or reserve buoy. The low-pressure inflation valve makes it simple to deploy, while oral inflation - only six full breaths - is useful in -out-of-air situations.

Really good.

By Brendan King on 24 May. 2023

This is one magnificent orange sausage! You would be seen from outer space. Pro's: Semi Sealing, Nice size. Good quality. I can see this lasting me years. It takes off like a Space X Rocket and stays inflated. Con's: Takes a bit of getting used to inflate. The semi-sealing magnet strips are not in a good place to open up the mouth. The loop also gets in the way and you have to fold it to the side to get the Octo in the right place. Niggles aside a really great value, quality DSMB.

Trade Customers

Northern Diver offers trade accounts. Please click here to register your details and find out if you qualify. Once your trade account has been confirmed you can view all trade prices and shop easily online when logged into your account. Please note when you are not logged in to your trade account retail prices are shown. If you have any queries please do not hesitate to contact us. Tel: +44 (0) 1257 25 44 44.