Protection of one of the world's richest and ancient collections of engraved rock art has stretched from land to sea, with the arrival of a new Ranger vessel to preserve sea Country in the World Heritage-listed Murujuga Cultural Landscape.

Nyamina - a custom-built 5.8m rigid-hulled inflatable boat for navigating inshore waters and beach landings and unloading - is named for the dugongs which inhabit Murujuga sea Country, encompassing Burrup Peninsula and surrounding islands of the Dampier Archipelago in the landmark UNESCO area in Western Australia's north-west Pilbara region.

Last year the Murujuga Cultural Landscape received World Heritage recognition, following six years of research and engagement work by Murujuga Aboriginal Corporation (MAC) and later key federal departments.

While MAC rangers on the land - like Sarah Hicks and Jade Churnside - spend their days preserving rock art and cultural history through new tools such as iPads and GPS pins to create a database of rock art and songlines, those on Nyamina will also be critical to the ongoing care of the 99,881 hectares of the Murujuga Cultural Landscape area that includes Burrup, 42 islands of the Dampier Archipelago and other marine areas.

MAC chairperson, Peter Hicks, said the vessel launch was a proud moment for Murujuga rangers and important to ongoing protection of Murujuga.

"We thank the government, Woodside and other organisations and individuals who have supported the Rangers... and provided crucial marine advice and technical support," he said.

Ranger Jade Churnside, whose artwork adorns the vessel and carries Murujuga culture to sea Country, revealed how the inspiration for her design carried extra meaning.

"Nyamina's art is inspired about Murujuga and a song I heard, Ganalili Wanggalili, about the sun rising in the morning, brining everything to life in the land," she said.

"I think it's pretty representative of the Ranger team."

Woodside Energy general manager Scarborough, Matthew Turnbull, said MAC rangers were critical to preservation efforts of the World Heritage Listed area and the Nyamina gave them greater capability to do that safely and independently.

Western Australian Minister for the Environment, Matthew Swinbourn, said Nyamina would be a powerful symbol of the deep cultural connection of the Murujuga people to the land and sea.

Built by Perth-based Corina Marine, the Nyamina is a model of RHIB commonly used for marine rescue and patrol operations with two crew and four special personnel.

Lotterywest and Woodside Energy contributed approximately $590,000 to the vessel and operation.