[3] This gives the ships a maximum speed of 17 knots (31 km/h; 20 mph) and the vessels have capacity for 63,700 US gallons (241,000 L; 53,000 imp gal) of diesel fuel.

[3] The Olympic class is the result of the Washington State Department of Transportation requiring replacements for its aging ferry fleet.

Funding for a third Olympic-class vessel was authorized in the Spring 2014 session of the Washington State Legislature, and the keel laying and first weld took place on December 9, 2014.

[2] She was christened on September 14, 2016 by Lynne Griffith, who at the time was serving as the head of the ferries system, the first woman to hold the office.

[2] Chimacum was forced into a three-day early temporary service on May 24 after Kitsap suffered a mechanical breakdown and all other vessels were in maintenance until Kaleetan, could replace her on the Seattle–Bremerton run to finish sea trials and training.