IT started out as just one man making creels on the Isle of Lewis, but now Inverness-based marine chandlers and supplier Gael Force has launched a significant growth plan with the acquisition of Forres-based Varis Engineering.

Varis focuses on the design, manufacture and installation of pontoons, marinas, access bridges and services, as well as new and refurbishment works in distilleries and waste-water treatment works.

Gael Force says it plans to grow Varis's 30-strong workforce, and that the deal will enhance its own drive to build sales from £15 million to £50m in the next five years, with further growth envisaged longer term.

The acquisition further expands Gael Force's capabilities in marine floating infrastructure. The engineering arm of the company has developed from designing and fabricating concrete caisson feed barges for fish farms along with specialist mooring services.

It is also focusing on expanding into the wave and tidal energy industries as well as building pontoons for marinas, harbours and a range of floating homes.

It is another major milestone for Gael Force, which has grown into a multi-faceted, marine supply business serving markets throughout the UK, Europe and North America in fish farming, fishing, offshore renewables and the oil and gas industry.

The Gael Force Group employs 180 staff at bases in Stornoway, Inverness, Forres and Plymouth.

Current combined Gael Force/Varis engineering sales are worth about £10m and the aim is to double that by 2017 by increasing activity in offshore oil-related fabrication, renewable energy work and pontoon sales.

Gael Force will also provide additional resources to develop business in maintenance programmes for whisky distilleries in Scotland as well as waste-water treatment work.

Stewart Graham, Gael Force Group's founder and managing director, said: "Varis and its product have been in our sights for quite some time. The Gael Force management has plotted a course of aggressive growth over the next five years across the group to a level of £50m and this acquisition of Varis takes us a significant step towards that."

Eddie Tomkinson, retiring managing director of Varis, added: "After 17 years of building up Varis, it was important to me that we found a new owner who can secure the company's future in Forres, provide additional resources to expand on our achievements to date and drive the company forward."

Gael Force also wants to develop marine equipment sales at its Inverness megastore and online shop, with plans to open two or three more outlets in the UK over the next five years.

In 2011, Mr Graham completed a round-the-world single-handed sail. The epic voyage had taken him two years – including time to recover from a broken back he sustained on the trip.