South West Subsea Pty Ltd is the South West’s trusted name in commercial diving, mooring inspections, and underwater infrastructure services. Based in Dunsborough and proudly operating since 2018, we specialise in the inspection, repair, and installation of Department of Transport-certified swing moorings, delivering reliable marine solutions to private vessel owners, councils, and marine infrastructure clients throughout Geographe Bay, Bunbury, Augusta, and beyond.
As a locally owned and operated company, we combine a deep understanding of the region’s coastal conditions with national compliance standards, including full ADAS accreditation and strict adherence to AS/NZS 2299.1. Our experienced dive team is backed by a purpose-built Class 2C dive support vessel, giving us the capability to mobilise quickly and perform across diverse marine environments — from recreational harbours to heavy commercial ports.
Whether we’re conducting annual mooring inspections, installing new systems, or rectifying aging underwater assets, our work is driven by safety, efficiency, and long-term reliability. We take pride in being one of the only dive companies in the region to offer complete cradle-to-grave mooring management: from permit support and diver inspections, to chain replacements, mooring block recovery, and DoT certification reporting.
Why Choose South West Subsea?
- ✔️ Specialists in mooring inspections, installations & repairs
- ✔️ Full compliance with Department of Transport WA regulations
- ✔️ ADAS-certified divers & insured commercial operations
- ✔️ Fast mobilisation and responsive scheduling
- ✔️ Trusted by local councils, marinas, and marine contractors
South West Subsea is more than just a dive team — we’re a marine solutions partner. From Busselton Jetty to Port Geographe, our reputation has been built underwater: through hard work, technical expertise, and a proven track record of excellence
