Hercules
An ocean-going steam tug from the age when towing meant coal, muscle and nerve — preserved today at San Francisco’s Hyde Street Pier, still looking ready for a shift.
Claim to fame: the surviving granddaddy of American working tugs.
Enrollment open · no tuition · bring a rope
Welcome to Tug School.
This whole site is about one tugboat. This page is about all of them — what tugs actually are, why they’re shaped like that, how strong they get, and where a 14-footer with cartoon eyes fits into 220 years of the proudest profession afloat. Your professor is the least qualified and most enthusiastic vessel available.
Towing 101
Can she tow it?
Tugboats are graded on one glorious stat: bollard pull — how hard a boat can pull, measured in tonnes-force while straining against a dockside bollard. The world record is 477 tonnes. A serious harbor tug manages 60–80. AWOOGA, per the back of this envelope, brings about 0.2. Pick a cargo and let the laboratory speak.
Tow-o-meterher pull vs. the job
Napkin math, proudly: a conventional prop makes very roughly one tonne of bollard pull per 100 horsepower, so her 20 hp Tohatsu pencils out near 0.2 t (≈440 lb) of pull. Do not cite this page in your naval architecture thesis.
The strength ladder
Every bar is bollard pull, drawn to the same scale. One of these competitors is drawn at her actual size and would like you to know the chart is rigged by physics.
AWOOGA’s bar again, magnified roughly 350×, so it can be admired properly.
Tug Spotting 201
A field guide to the species
Tugboats are not one animal — they’re a whole genus, split by where they work and how their propellers point. Silhouettes below, field marks included, exactly like a birding guide. Spot one in the wild (harbors, rivers, children’s television), come back, and log it. Your life list is saved on this device.
Tug History 301
The Hall of Fame
Real tugs, storybook tugs, and one nepotism admission the ethics board has agreed to overlook.
Edna G
The Great Lakes legend out of Two Harbors, Minnesota — the last coal-fired steam tug working the lakes when she finally retired in 1981, after eight decades on the clock.
Claim to fame: outworked every technology invented to replace her.
The Ever Given rescue squad
When a quarter-mile container ship corked the Suez Canal for six days, it was a dozen-odd tugs (with a dredger assist and one very good full moon tide) that popped it loose while the whole planet watched.
Claim to fame: tugkind’s finest televised hour.
Sparky
The world’s first full-size, fully electric harbor tug, working Auckland with 70 tonnes of battery-powered bollard pull and zero exhaust. Named by local schoolkids, which is the correct way to name a tug.
Claim to fame: the future of the species showed up quiet.
Little Toot
Hardie Gramatky’s picture-book harbor kid who’d rather play than tow — until a storm makes a hero of him. The founding text of small-tug-with-big-heart literature.
Claim to fame: taught generations that the little one saves the day.
Theodore Tugboat
The friendly face of Halifax Harbour, from Canadian TV — a model tug with a red ball cap who handled feelings and shipping schedules with equal care.
Claim to fame: proof a tugboat can anchor a whole childhood.
TooT TooT
Mike’s little tug — spotted at Mystic in 2010, source of one fateful “you can build that,” and the genetic origin of everything on this website. Induction committee: her descendant. Objections: none received.
Claim to fame: see the Lineage. It’s all her fault.
Elective
Which tug are you?
Five questions. No wrong answers, only slower ones. The faculty will assign you a species.
The Lingo Lab
Talk like a tugboater
Eight terms that will let you nod convincingly on any working waterfront. Real definitions on the back of every card; tap to flip.
Closing seminar
220 years down the pier
The whole history of tugboats, walked plank by plank. Watch the class sizes as you go — there’s a trend, and then there’s a correction.
1803
The Charlotte Dundas proves the point
A stubby steam paddler tows two loaded barges nearly twenty miles down Scotland’s Forth & Clyde Canal, and the towing profession stops meaning “horses.” The first practical steam towboat, and arguably the first tug.
Class size: ~56 ft
1830s–1870s
Paddle tugs take the harbors
Steam paddle tugs swarm every major port, dragging sailing ships in and out of harbors regardless of wind. The word tug sticks, because that is exactly and only what they do.
Class size: ~100 ft
1880s–1900s
Steam, steel and screw propellers
Propellers replace paddles, steel replaces wood, and the classic tugboat profile — proud funnel, wheelhouse, tires-to-be — is born. The Hall of Fame’s Edna G (1896) and Hercules (1907) are this class’s honor students.
Class size: ~100–150 ft
1910s–1950s
Diesel clocks in
Diesel engines send steam to the museum: more pull, fewer crew, no coal dust on the sandwiches. The tugboat becomes the round-the-clock workhorse ports still depend on.
Class size: ~100 ft, twice the muscle
1950s–1980s
Tugs learn to dance
Cycloidal “tractor” drives and then steerable Z-drives arrive, and thrust learns to point in any direction. Tugs begin walking sideways, spinning in place, and berthing supertankers with balletic contempt for momentum.
Class size: ~90 ft, infinitely more agile
2020s
Records and batteries
The species peaks in both directions at once: Island Victory sets the all-time bollard-pull record (477 t, 2020), while Sparky goes fully electric in Auckland (2022). Bigger, stronger, cleaner — the trend line only points up.
Class size: up to 405 ft
2025
The trend line, boldly reversed
In Clinton, Connecticut, a man in a two-car garage spends three years building the counter-argument: AWOOGA, 14′3″ of marine plywood with a foghorn eight sizes too big. Peak miniaturization. The historians are still arguing about whether this is progress; the harbor has already voted.
Class size: 14 ft 3 in. You read that right.Graduation