• A mid-afternoon veiw down the expanse of Isle Royale National Park.  Photo taken from the Mount Ojibway Fire Tower.

    Isle Royale

    National Park Michigan

RANGER III statistics

Ranger III in dry dock
Ranger III in dry dock
National Park Service


MISSION: Logistical Support of Isle Royale National Park

Length 165 feet
Beam 34 feet
Depth 15 feet 1 inch
Draft 10 feet 6.5 inches
Load Displacement 835 short tons
Crew 6 - freight, 9 passenger
Passenger Capacity 128
Cargo Capacities 100 tons dry
7,500 gallons of oil

650 cubic feet of
refrigerated and freezer

Main Engines 2 Caterpillar 3508 B;
850 BHP @ 1200 RPM
Propellers 2 Bird-Johnson Controllable
Pitch, 76" Diameter
Bow Thruster 250 HP/Hydraulic
36" diameter fixed pitch
Power Generators 2 Caterpillar 3304,
55 KW
Crane 3.1 Ton Hydraulic
30-foot boom

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