18,300 Horsepower Tug Saves The Day
Marine Diesels - Two Stroke Cycle Marine Diesel - Fairbanks Morse Diesel - Diesel Jobs
Marine Engineering - Marine Propulsion - Anchor Handling Tug Arctic Duty
What kind Diesel Powered Tug can tow a 734 foot long bulk carrier at 8 knots in the
inhospitable seas off the Aleutian Islands? The answer is a tugboat with over
18,300 horsepower. It’s hard to imagine a power plant with that kind of output on
something that still calls itself a tug. Learn more about
Marine Diesel Jobs. We’re
used to seeing Electro-Motive Diesels, or EMDs like the model 645 or model 710 on
larger ocean-going tugboats.   
We see medium speed Caterpillar Diesels and Detroit Diesels on many inland
workboats, in 6 cylinder, 8 cylinder, or 12 cylinder arrangements. We see GM6-71s
and GM8-71 diesels, Perkins, Westerbekes, John Deere’s, and Detroit Diesels on
boats pulling harbor duty. We see two-stroke diesels, four-stroke diesels and bio-
diesel burning marine power plants in many applications.
The ultra-powerful Invader Class of Crowley tugs have an impressive 7,000 H.P.
between their twin EMD sets. There are inland towboats with triple Cooper
Bessemer drive trains that put out 8,000 or 9,000 H.P. We feature an interesting job
at the
legal jobs Wildcards page for an Instructor at the World War II fleet submarine
U.S.S. Pampanito (which by the way, had a set of Fairbanks Morse opposed piston
engines).

Any way you cut it, an 18,300 horsepower tug is simply mind boggling. There are
ocean-going ships running slow-speed MAN and Wartsila diesels with smaller
power plants. You simply don’t expect to find that size prime mover on a tug. And that’
s because the Tor Viking II is no ordinary tugboat. Together with her two sisters, she
works unforgiving Baltic and Arctic seas, pulling anchor handling and ice-breaking
duty. It’s lucky for the bulk carrier she was there that day.
Tor Viking II  is an AHTS vessel whose sister, Vidar Viking, is shown in this photo. The class
consists of three ships, all of which are suited for ice-breaking duty. They can operate in 4 foot
thick ice. They are called tugs, but that may be in name only. They are really a very distant
relative of your typical harbor tug. Their 1,200 horsepower bow thruster and 1,200 horsepower
stern thruster are roughly the horsepower of a medium size tug. These relatively new vessels
that were laid down in 2000 have a displacement of 4,000 tons. That’s more than a typical World
War II destroyer. They are 275 in long, 59 feet wide, and draw 24 feet of water. They are
powered by diesel engines totaling 18,300 horsepower. They have a crew of twenty three and
can do 16 knots. They are by no means ordinary tugboats. But then again, no ordinary tugboat
would have been able to tow a 734 bulk carrier at 8 knots like a sack of feathers.
Source for technical specs: Arctic Logistics Information and Support.
The photo above shows the bulk
carrier Golden Seas being towed
to the safety of Broad Bay, near
Dutch Harbor, Alaska by the Tor
Viking II after experiencing
machinery problems. The
arduous 500 mile journey along
the Aleutian Islands was carried
out by the Anchor Handling
Tug/Icebreaker Tor Viking II on
Dec. 7, 2010. Three days earlier,
the Liberian-registered cargo
ship suffered a turbocharger
failure. The Tor Viking II braved
30 foot seas and 40 plus knot
winds in this heroic towing effort.

It was a lucky day for the bulk
carrier that an 18,300
horsepower tug happened to be
in the neighborhood. There are
ocean-going ships running slow-
speed MAN and Wartsila diesels
with smaller power plants. You
simply don’t expect to find that
size prime mover on a tug. And
that’s because the Tor Viking II is
no ordinary tugboat. Together
with her two sisters, she works
unforgiving Baltic and Arctic
seas, pulling anchor handling
and ice-breaking duty. It’s lucky
for the bulk carrier she was there
that day.