Sandy Straits Marine
Sandy Straits Marine
  • Boat Building and Repairs
  • Fibreglass Services
  • Insurance Work
  • Marine Painting Services
  • Fit Outs
  • Quality Workmanship

Past and On-going Projects at Sandy Straits Marine in Hervey Bay.

Current Project
Sandy Straits Marine is currently building a 7.3 metre catamaran in conjunction with Streamline Catamarans. We are building the fibreglass hull in solid glass with a layer of basalt fibre and E/glass and CSM in a polyester ISO system.

Building a 7.3  metre catamaran
Building a 7.3  metre catamaran
Building a 7.3  metre catamaran

This project is coming along just fine and we have incorporated a layer of basalt fibre in the lay up. This basalt fibre has similar strengths as carbon fibre and similarity of Kevlar fibre. This high tech fibre has been around for a short time and has been in use in space and missiles, and now in boats for its strength. The top side and frames are all in non rot material for its strength and lightness, the transom is of a non rot material.

The 7.3 metre cat is an hull designed for the serious fisherman or the type that likes to get away for a week at a time or even a couple of days. The one that we are building will be fitted out with a toilet and shower and a full size double bed, or two singles, with an area to accommodate a fridge and a cooker with table.

We are powering this one with twin 140hp Suzuki four stroke out boards with enough fuel to do some four hundred nautical miles. We have also fitted in a 120 litre fresh water tank. The boat is of a solid glass hull with basalt in the lay up and the top is in a composite of foam and glass. We just can't wait to get this one in the water and give it a test!

The designer of this craft is Noah Thompson, a well known boat designer. The design provides an easy to push through the water hull shape and a light weight. It also fits on a trailer so you can park it in your shed at home.


Tri 4.5 Metre Whaler
The 4.5 Tri is a resin infused hull and in a vinyl ester system. The lay up is in E glass 600 D/byes, as this provides superior strength and excellent anti osmosis properties. The hull transom is in a non rot material making it a boat that will last and last.

We have used, in our floors, a light weight, but strong, high density foam. This glassed over makes for a even tougher boat with added buoyancy. We also have foam under the floor and in the top deck for more buoyancy.

We have introduced basalt fibre to the lay up to see how that infused into the hull. The bare weight of the hull is only 100kg and top deck is 30kg. This makes for a very light and easy to manage boat with excellent stability. With the motor and all the flooring it weighs in at just over four hundred kgs. The motor is a 60hp Yamaha four stroke that pushes the Tri 4.5 along very well.

Building the Tri 4.5 Metre Whaler
Building the Tri 4.5 Metre Whaler
Building the Tri 4.5 Metre Whaler
Building the Tri 4.5 Metre Whaler
Building the Tri 4.5 Metre Whaler
Building the Tri 4.5 Metre Whaler

It cuts through the water very well, with nil spray in calm conditions, and you can stand on the edge of the boat with out the fear of it tipping over, so stability is very good. Launching and retrieving is also very easy, my wife found it a cinch to winch up.

The boat at the moment comes in three types of configurations – one being a tiller steer, one a center consol and the other being a side consol. I am working on a sport model at the moment, so stay tuned.