North Slope Borough — History

The North Slope Borough (NSB) is the northernmost borough (equivalent to a county) in Alaska, covering over 94,000 square miles (245,000 km²), making it the largest county-level jurisdiction in the United States. The borough extends from the Arctic Ocean in the north to the Brooks Range in the south. It has a population of approximately 10,000, with Utqiagvik (formerly known as Barrow) being the largest community.

As of 2025, the NSB operates a dedicated Search and Rescue (SAR) helicopter service width S-92 and Bell 412 aircraft which are set to be replaced by a pair of Leonardo AW189

News

Alaska North Slope Borough Orders Two SAR AW189

Mar 11, 2025 · The North Slope Borough (NSB) of Alaska ordered 2 Leonardo AW189 helicopters with Emergency Medical Services (EMS) interiors for search and rescue (SAR) across its expansive 95,000 square-mile service area, located entirely above the Arctic Circle
Sikorsky Recognized Alaska’ North Slope Borough

Mar 7, 2017 · Since September 2016, Alaska’ North Slope Borough S-92 has performed nearly a dozen search and rescue missions
Alaska’s First S-92 Search and Rescue Helicopter

Sep 29, 2016 · North Slope Borough (NSB), Alaska received its first S-92 helicopter dedicated to search and rescue (SAR)
Alaska North Slope Borough Signs for S-92

Mar 4, 2015 · North Slope Borough, America farthest north municipal gov, orders a S-92. NSB encompassing an area of nearly 95,000sm across northern Alaska including eight communities and the Prudhoe Bay oil fields

Airframes (3)

Reg	Model	C/N	Built
N402ES	412sp	33177	1988
N785SR	206l-1	45526	1980
N917CB	s-92a	92-0272	2014

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