The Tustumena at the dock in False Pass, Alaska
|Namesake:||Tustumena Glacier in the Kenai Peninsula|
|Owner:||Alaska Marine Highway System|
|Port of registry:||United States|
|Builder:||Christy Corporation, Sturgeon Bay, Wisconsin|
|Status:||in active service|
|Displacement:||3,067 long tons (3,116 t)|
|Length:||296 ft (90 m)|
|Beam:||56 ft (17 m)|
|Draft:||14 ft 4.5 in (4.382 m)|
|Decks:||One vehicle deck|
|Ramps:||Aft port and aft starboard ro-ro loading|
|Installed power:||5,100 hp (3,803 kW)|
|Speed:||13.85 knots (25.65 km/h; 15.94 mph)|
Tustumena was constructed in 1963 by Christy Corporation in Sturgeon Bay, Wisconsin  and refurbished in 1969 in San Francisco. As the only mainline ferry in South-central Alaska and the Aleutian Chain, it principally runs between Kodiak, Seldovia, Port Lions, and Homer with Homer providing a road link to the other communities on the Kenai Peninsula. The only interruptions from this schedule occur when making a voyage out the Aleutian Chain (the Aleutian Chain run consists of the communities of Akutan, Chignik, Cold Bay, False Pass, King Cove, Sand Point, and Unalaska/ Dutch Harbor) which the vessel undergoes eight times a year all of which occur during the summer as winter weather becomes too dangerous.
Because of the exposed and unstable parts of Alaska it plies, the Tustumena is an accredited ocean-going vessel, a quality it shares exclusively with the Kennicott. As such, the Tustumena is replaced by the M/V Kennicott when it undergoes annual maintenance.
The Tustumena is the smallest AMHS vessel to have cabins. The Tustumena's amenities include a full service dining room; cocktail lounge and bar (which is now closed; there is wine and beer service at meals); solarium; forward, aft, movie, and business lounges; eight four-berth cabins and 18 two-berth cabins. The large black structure on the aft portion of the vessel is a car elevator. It is used in all communities where there is not a dedicated ramp loading directly into the car deck. While the car elevator for the Tustumena is exposed on the exterior, the Kennicott car elevator is located inside the vessel.
In the fall of 2012, Tustumena went into scheduled maintenance at the dry-docks of Seward Alaska. Several found issues pushed her return from service from the original May 29th to a planned July 23rd, leaving the state without a ship available to do her run.  The return to service was delayed twice more, due to the discovery of serious issues with the vessel's steel and further delays at the shipyard. The ship missed the entire summer season and was not returned to service until October.  Given the age of the vessel, and her extended time in dry-dock, the State is looking to find or build a replacement vessel, design work began in the fall of 2013  but was not completed until early 2016. The vessel is planned to be largely funded by the federally-funded Alaska Statewide Transportation Improvement Plan, and is not slated to begin construction before 2019. 
In 2017, scheduled repairs once again revealed serious issues. It was found that the steel on the car deck needed to be replaced entirely and the vessel was delayed from returning to service.  During the course of that work being done, rusted and pitted steel was also discovered in the engine room, and the vessel is not expected to return to service until mid-August, missing the bulk of the summer season.  The M/V Kennicott is providing services between Homer and Seldovia and Kodiak on a limited schedule. A private carrier is providing freight service to the Aleutian islands but is not permitted for passenger transport. 
- Alaska Department of Transportation Alaska Marine Highway Vessel Profiles Archived 2013-03-30 at the Wayback Machine.
- Colton, Tim. "Bay Shipbuilding, Sturgeon Bay, WI". shipbuildinghistory.com. Archived from the original on 2015-07-03.
- Associated Press (June 4, 2013). "Tustumena Now Out of Service Till July 23". KTUU. Retrieved June 6, 2013.
- Jackinsky, McKibben Finally, Tustumena returns to service Homer News 10/23/2013
- Associated Press (May 23, 2013). "State planning replacement of Tustumena ferry". Juneau Empire. Retrieved June 6, 2013.
- Chandler, Quinton New Tustumena design ready KTOO (FM)/ Alaska Public Media 2/15/2016
- M/V Tustumena return to service delayed until May 27 Alaska Department of Transportation and Public Facilities
- Bolton, Aaron, Tustumena's return delayed until August KBBI6/6/16
- Armstrong, Michael, Tustumena return delayed until July 18, Homer News, 05/11/2017