HM Air

HM Air is the charter, fixed wing and turbine division of Heli-Muster NT, a family owned aviation company in Katherine, Northern Territory. Heli-Muster was started in 1976 by John Weymouth as a two-helicopter cattle mustering operation and by the mid 1980s ran more than 26 mustering helicopters across the Top End. HM Air operates across the Northern Territory, north-east Western Australia and north-west Queensland, with bases in Katherine, Nhulunbuy, Darwin and Alice Springs.

Services

• Fixed wing charter for government, corporate and private clients, remote trade work, crew changes and patient travel
• Helicopter charter, private and corporate transfers and event arrivals
• Scenic flights over Nitmiluk (Katherine Gorge), Victoria River and Central Australia, plus heli-fishing trips
• Aerial cattle mustering under the Heli-Muster NT name
• Aerial crane, agriculture, film, fire and emergency, mining and gas support, survey and powerline inspection
• Maintenance: Robinson Authorised Service Centre, R22, R44 and R66 overhauls, Robinson parts and field engineering support

Fleet

Helicopters: Robinson R22, Robinson R44 Raven I, Cabri G2, Airbus AS350 B3 Squirrel and Bell 206L LongRanger. Fixed wing: Beechcraft Baron 58, Cessna 206H Stationair, Cessna 210 and Cessna 172.

Company facts

• Heli-Muster founded in 1976 by John Weymouth
• Subsidiary of Heli-Muster NT Pty Ltd, Air Operator's Certificate CASA.AOC.0058
• CASA approved maintenance organisation with in-house LAMEs and apprentices maintaining over 25 aircraft
• BARS registered operator, audited to Silver status in 2025
• Certified carbon neutral under Climate Active
• Fixed wing base at Tindal Civil Terminal, Katherine Airport

Contact

Website: hmair.com.au

Phone: +61 8 8975 0777

Location: 135 Florina Road, Katherine, NT 0850