Please select your home edition
North Sails 2021 Innovation - LEADERBOARD

Marine Biosecurity: Plan B: Five alternatives to Antifoul

by Clean Below? Good to Go 21 Oct 2021 03:47 PDT 21 October 2021
Milford Marina is located in Wairau Creek in Auckland. The fresh water in marinas like this one can help inhibit some marine growth © Marine Biosecurity NZ

Antifoul is considered our best line of defence against marine pests, but it's not the only option. From simply using your boat more often, to sophisticated technologies, here are some other options to consider.

Last week, we looked at how the industry is developing and innovating to create better, more effective antifoul coatings. This week we take a look at five other options for boat owners to consider.

Berth your boat in fresh water If you are fortunate enough to have a fresh water berthage option, perhaps in a river entrance, this is a great way to keep most marine pests off your boat and its appendages. It should be noted that there are other types of biofouling associated with fresh water and these also need to be controlled.

Store your boat on the hard Hardstand storage, a dry stack or a trailer are great ways to make sure that certain types of boats don’t get fouled. Here you need to ensure that your boat is thoroughly cleaned immediately after it comes out of the water in order to maintain the integrity of the antifouling coating.

Boat lifters Have a chat with your marina operator about the possibility of a boat lifter. Options on the market include SeaPen, FloatLift, and Float Bricks. Brent says in his experience, the most effective ones lift the boat completely out of the water. Remember that the boat lifter device itself will also need to be removed from the water for cleaning and antifouling every 18 months or so – but your boat will be free of marine pests and ready to go on its travels.

A solution for underwater fittings Propspeed and its family of foul-release products including Foulfree and Lightspeed, are developed in New Zealand and work effectively to control biofouling on propellers, shafts, struts, rudders, bow thrusters, keel coolers, swim platforms, transducers and underwater lights. Foul-release coatings use physical rather than chemical means to reduce fouling, typically by creating a surface that’s tough for marine organisms to adhere to. Propspeed can be also successfully used on composites such as on stabilizers, composite keels and rudders.

Silicone based antifoul coatings can be ideal for commercial boats Products such as Silicone based antifoul coatings – which apply a low friction surface to a vessel are ideal for commercial boats which are constantly on the move, says Brent Wilson of Marsden Cove Marina, but unfortunately less effective on recreational boats.

“The silicone option is great but if the boat doesn’t move, it doesn’t matter what you put on it, something will grow.” Take note: silicone products are also easily damaged by cleaning as well as impact.

And finally… use your boat more often

Boats that move regularly stay cleaner than boats that sit still. A great way to help prevent biofouling is to use your boat more regularly (when lockdown levels allow). So, to help slow down growth, take it out for a spin! A harbour cruise. Or get out for a race. It keeps your maintenance costs down, and helps to reduces biocide resistance too.

This is Part 2 in our special antifoul series. The information expressed in this article is the opinion of those interviewed and not necessarily that of ‘Clean Below? Good to Go’. Please seek expert advice when choosing and applying an antifoul coating.

Get more info about marine biosecurity in NZ at

Related Articles

Marine Auctions February 2023 Online Auctions
44ft flybridge power catamaran, Gib'Sea 44.2 sailing yacht, and more Bidding starts on Thursday 16th February and will end on Wednesday 22nd February 2023 at 2 pm AEST. Check out the 44ft flybridge power catamaran, Gib'Sea 44.2 sailing yacht, and more. Posted on 4 Feb
Visit Qatar GKA Freestyle-Kite World Cup update
All you need to know ahead of the finals Just under 90 minutes north of Doha, Fuwairit Kite Beach resort hosts round one of the 2023 Qatar Airways GKA Kite World Tour and this event is fully focused on the Freestyle discipline. Posted on 4 Feb
The Ocean Race Leg 2 Day 11: Around the outside
Compression and a move to the south leaves Stanjek's crew looking for answers "Around the outside" is a trope that gets pulled out at one point or another on every edition of The Ocean Race. It refers to a tactical option on the race course where a boat, or boats, sail a longer route in more favourable conditions. Posted on 4 Feb
US Sailing Association Awards winners
Honored at Sailing Leadership Forum in Florida Thursday evening, winners of the 2022 US Sailing Awards were honored among family, friends, peers, and competitors at US Sailing's Sailing Leadership Forum in St. Pete Beach, Florida. Posted on 4 Feb
Winter Jackets - Embrace the Elements
Henri-Lloyd Parka and Shell jackets are built for exploring Henri-Lloyd Parka and Shell jackets are built for exploring. Plus win one of sixty £60 vouchers by sharing your photos. Posted on 4 Feb
Visit Qatar GKA Freestyle-Kite World Cup update
The riding fleet is very compact at this event As was forecast, conditions continued to deliver the lighter southerly winds on day two of the Visit Qatar GKA Freestyle Kite World Cup, though a positive start was made to the competition and the line-up for the women's final is complete. Posted on 4 Feb
Get ready for the 2023 Camden Classics Cup
Two days of great racing on Penobscot Bay, Maine, this July We are still in awe of the success of the 2022 Camden Classics Cup. Stunning weather, exciting racing conditions, a brand new facility for post racing festivities and a record number of 91 yachts made 2022 an amazing year. Posted on 4 Feb
Cup Spy Feb 3 : American Magic smashes 50kt mark
American Magic consistently broke the 50kt speed barrier sailing in winds of up to 25kts. Arguably the fastest AC75 yet, American Magic's Patriot proved the point again today in Pensacola when she consistently broke the 50kt barrier sailing in winds of up to 25kts. Posted on 4 Feb
Lineup confirmed for 58th Congressional Cup
The world's top match racing skippers will return to Long Beach, California The world's top match racing skippers will return to Long Beach, Calif. April 18 to 22, 2023 for the 58th Congressional Cup regatta - presented by Long Beach Yacht Club, and a founding event on the prestigious World Match Racing Tour. Posted on 4 Feb
Patrick Phelipon - fifty years at sea
But still a dream to fulfill in the Global Solo Challenge Patrick Phelipon was the first skipper to register "Full Entry" for the Global Solo Challenge. Known as the most Italian of French sailors, he is a yacht designer and builder, let's say, an all-around sailing professional. Posted on 4 Feb
Upffront 2020 Foredeck Club SW FOOTERNorth Sails 2021 Innovation - FOOTERRS Sailing 2021 - FOOTER