Duckworth 21 2011 vs Duckworth Navigator Sport 175 2007 - Boat Spec Comparison

Q: Which is the larger boat — the Duckworth 21 2011 or the Duckworth Navigator Sport 175 2007?

The Duckworth 21 2011 is the longer of the two at 21,0 feet overall. The Duckworth Navigator Sport 175 2007 comes in at 17,0 feet, making it roughly 4,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: How many people can each boat hold?

The Duckworth 21 2011 is Coast Guard rated for 6 passengers, while the Duckworth Navigator Sport 175 2007 is certified for 5. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.

Q: Do these boats require an oversize trailer permit to tow on US highways?

Both the Duckworth 21 2011 and Duckworth Navigator Sport 175 2007 share an 93.5 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

Q: Which boat has the larger fuel tank — the Duckworth 21 2011 or the Duckworth Navigator Sport 175 2007?

The Duckworth 21 2011 has the bigger tank at 62 gallons, versus 42 gallons on the Duckworth Navigator Sport 175 2007. That 20-gallon difference translates to roughly 60–100 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Duckworth 21 2011 and Duckworth Navigator Sport 175 2007 from the same manufacturer?

Yes — both the Duckworth 21 2011 and the Duckworth Navigator Sport 175 2007 are built by Duckworth. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.

Boat Comparison

Duckworth 21 2011 vs Duckworth Navigator Sport 175 2007

Duckworth

Duckworth 21 2011

2011

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Duckworth

Duckworth Navigator Sport 175 2007

2007

View full specs →

Detailed Evaluation & Buyer Recommendation

Duckworth 21 2011 vs Duckworth Navigator Sport 175 2007 — Which Deep Vee Fits Your Needs?

When two boats share the same hull type — in this case both the Duckworth 21 2011 and the Duckworth Navigator Sport 175 2007 are deep vee designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

For family outings this is probably the sharpest distinction between the two. The Duckworth 21 2011 is rated for 6 passengers, while the Duckworth Navigator Sport 175 2007 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Duckworth 21 2011 could be the deciding factor.

Bottom line: Choose the Duckworth 21 2011 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Duckworth Navigator Sport 175 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.

General Boat Info

MakeDuckworth

Model21

ModelNavigator Sport 175

Model Year2011

Model Year2007

Measurements / Dimensions

Beam93.5 in

Beam - Meters2.39

Beam - Inches93.5

DeadriseTransom: 14°

Deadrise24℃ bow variable to 14℃ at transom

Weight - Detail2,800 lbs

Weight - Detailnot available

Weight - kg1270.06

Weight - kgnot available

Weight - lbs.28

Weight - lbs.not available

Width [transom] - Detail72 in

Height - DetailSides: 32 in

Height - Detail32 in

Height - Meters0.81

Height - Inches32

Length - Feet21

Length - Feet17

Length overall - Detail21 ft

Length overall - Detail17 ft. 6 in

Length overall - Meters6.4

Length overall - Meters5.33

Length overall - Inches252

Length overall - Inches21

Length - Inchesnot available

Length - Inches6

Body / Hull

Hull materialAluminum

Hull thicknessBottom: 0.190 in. 5086-H116 Sides: 0.125 in. 5052-H32

Hull thickness0.125 in

Hull typeDeep Vee

Hull typeDeep vee

Engine and Drivetrain

Engine/s standard5.7 l MEFI-5 catalyzed

Engine/s standardYamaha

Jet pumpAmerican Turbine SD-309

Jet pumpnot available

Fuel tank capacity - Detail62 gal

Fuel tank capacity - Detail42 gal

Fuel tank capacity - Liters234.7

Fuel tank capacity - Liters158.99

Fuel tank capacity - Gal62

Fuel tank capacity - Gal42

Fuel typeGas

Drive typeInboard

Drive typeOutboard

Duckworth 21 2011 vs Duckworth Navigator Sport 175 2007 — Common Questions

Which is the larger boat — the Duckworth 21 2011 or the Duckworth Navigator Sport 175 2007?

The Duckworth 21 2011 is the longer of the two at 21,0 feet overall. The Duckworth Navigator Sport 175 2007 comes in at 17,0 feet, making it roughly 4,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

How many people can each boat hold?

The Duckworth 21 2011 is Coast Guard rated for 6 passengers, while the Duckworth Navigator Sport 175 2007 is certified for 5. Note that legal capacity and comfortable capacity aren't always the same thing — on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.

Do these boats require an oversize trailer permit to tow on US highways?

Both the Duckworth 21 2011 and Duckworth Navigator Sport 175 2007 share an 93.5 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

Which boat has the larger fuel tank — the Duckworth 21 2011 or the Duckworth Navigator Sport 175 2007?

The Duckworth 21 2011 has the bigger tank at 62 gallons, versus 42 gallons on the Duckworth Navigator Sport 175 2007. That 20-gallon difference translates to roughly 60–100 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Are the Duckworth 21 2011 and Duckworth Navigator Sport 175 2007 from the same manufacturer?

Yes — both the Duckworth 21 2011 and the Duckworth Navigator Sport 175 2007 are built by Duckworth. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.

← Duckworth 21 2011 full specs ← Duckworth Navigator Sport 175 2007 full specs