Johnson’s Barge Service Ltd offer a full mooring installation, audit, maintenance, salvage and repair service for swing moorings in the Marlborough Sounds, D’Urville Island, Croiselles Harbour and Nelson areas.  

We are proud of our highly experienced & knowledgeable team both on and under the water! 

We are happy to try and answer any queries or questions you may have.


New Installations, upgrades, resource consents, servicing, salvage, cleaning & general care.

Contact us at the office for help and guidance with all aspects of mooring ownership.

Servicing System

When servicing moorings, we lift the whole mooring out of the water to allow us to measure all components, (chain, shackles, swivels etc) for wear. Components must be replaced when they have worn by 20% from their original size.

We clean the whole length of rope of any mussel and weed growth, scrub the float and re-name and number it with the owners name and registration number. All components are recorded and the wear is recorded at each subsequent service.

If any repairs are required we are able to do them on the spot as we carry all chains, ropes, shackles, swivels, floats etc with us, along with gas cutting and welding equipment. All shackle pins are welded in place.

We use locally made mooring blocks, the design of which has been engineer certified, and Graeme Smith of Town and Country Builders has been making concrete blocks for moorings and the mussel industry for over 30 years – that’s over 8000 blocks!!


Moorings are required to be lifted and serviced every two years but often become very heavily fouled with weed and mussel growth well before their service is due. We now offer a “Float and Rope” clean-only around the 12 month mark in between the biennial service. This can help keep your mooring floating by removing the weight of growth from the rope and can help prevent lost moorings, which then require the additional cost of a diving service to locate them.


We operate a system for our mooring clients where we send out a ‘courtesy reminder of service due’ when your mooring requires its biennial service inspection.


All new builds and repairs are carried out in accordance with the Marlborough District Council’s minimum construction guidelines. We also issue a Mooring Inspection Record for your files, and a copy of this is sent directly to the MDC so they know that your mooring has been serviced.

Need a diver? 

We are proud to have joined forces with Marlborough Commercial Diving Services. If we need to salvage your mooring, Nathan & Ben will take care of it.

These guys are experts in their field and are well-equipped for all areas of subsurface work.

We look forward to working with them both on and under the water!

Terms & Conditions - Moorings

Mooring Servicing and Mooring Products / Consumables.  

Approval of consent to service mooring 

Johnsons Barge Service Limited on written (preferred) or verbal acceptance of servicing will schedule the mooring servicing at our next nearest available possibility.  

We operate a reminder service which we email reminders to you. We will not service your mooring without consent of the mooring owner.  

Title to product ownership 

Title to all mooring Products:  Ownership of the mooring products does not pass to the customer until the customer has paid Johnson’s Barge Service Ltd in full. This includes but is not limited to…  

Mooring Blocks 





Buoy Floats 

Time and cost associated with Mooring Servicing / Install 


Warranty & Liability  

Mooring works undertaken have a limited warranty only to the date of inspection by Johnson’s Barge Service Ltd or any contractors employed by Johnsons Barge Service limited.  

Liability: Except for those required or implied by legislation, Johnsons Barge Service Limited or its contractors give no express warranty in relation to products and services supplied to the customer and the customer acknowledges that it has not relied on any representation or warranty made by Johnson’s Barge Service Ltd or its Contractors. 

Mooring Inspection Certificates.  

 All mooring certificates on completed mooring services, will be sent directly to The Marlborough District Council. A copy of your mooring certificate is available from us on request, as a result you may receive a monitoring notice/invoice from The Marlborough District Council. Any queries regarding these notices / invoices should be directed to the Marlborough District Council.   

Continued Responsibility between servicing.  

Until the next biennial service it is your responsibility to keep a close check on the condition of the mooring rope and float and to keep it as clean as possible to prevent the weight of growth from sinking the float.  

Ropes can wear very quickly at friction points, i.e: fairleads, bollards, cleats, anchor rests etc.  

It is also important to ensure that your vessels electrical system is in good working order to prevent electrolysis from affecting the metal components of your mooring.

Standard payment terms apply. If payment is not received as stated above, we reserve the right to charge interest, at a rate of 4% above the BNZ overdraft interest rate.

The client is responsible for all costs in connection with late payment including debt collection costs and all other costs and expenses incurred in recovery or the attempted recovery of all payments.

Care and Maintenance Tips


Floats and the top section of the mooring rope are inclined to grow mussels, barnacles and weed very quickly.  As often as possible you should scrape the mussels and weed off the float with the backside of a knife blade and clean as far down the main rope as you can. This is most easily done at low tide so you can pull more of the mooring rope onto your boat. We also offer a Float and Rope Cleaning Service (see Cleaning Services above).


Keep a close check on the integrity of your float rope as this can become chaffed from sharp shells or if it gets tangled around a propeller. Floats also need to be checked for cracks and leaks which let in water etc. Anything that causes your float to sit low in the water makes it more vulnerable to being run over by other boats and chopped up.  Then your mooring would require diving to refind it.


Some boats are very hard on their mooring ropes where the rope goes over the fairlead.  You should regularly inspect the main mooring rope for any sort of chaffing and protect the rope from sharp fairleads, bollards etc, if possible.  In a storm, boats can wear out their mooring ropes very quickly if there is a chaffing problem.
You should never leave the boats anchor sitting in the fairlead when your boat is on the mooring.  Anchors and their chains can cause major chaffing of the mooring rope.  We have seen several boats go ashore when the mooring rope has been cut through by an anchor in the fairlead.