BoatsJ Boats J/45

J Boats J/45

Fractional Sloop · Fin w/bulb & Spade Rudder · First built 2021

A high-performance Alan Johnstone fractional sloop designed for fast, comfortable offshore cruising

Designed by Alan Johnstone.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/bulb & Spade Rudder

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her light displacement on a moderate beam gives 25 — a moderate, middle-of-the-road motion.

Comfort ratio 25
CoastalBluewater

1.97 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.97
LightHeavy

146 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 146
EasygoingPowered-up

22.9 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 22.9
TenderStiff

40% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 40%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

  • Draws more than ~87% of boats her size on file
  • Beamier than ~79% of boats her size on file

Compared with 2281 boats of the same type within a quarter of her length.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
40.0%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
22.9
Displacement / length
146.2
Comfort ratio
24.9
Capsize screening
1.97
Hull speed
8.6 kn
Pounds / inch immersion
2054
Hull
Hull type
Fin w/bulb & spade rudder
Construction
FG w/ infused sandwich composite
Ballast type
Cast iron keel with lead bulb
Production
Years built
First built 2021
Designer
Alan Johnstone
Builder
J Boats

Boats like this, on the water

Nobody has filmed this one — but these are close.

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Dufour Yachts 4413.91 mSame hull familyNear-identical lengthA 2024 Felci-designed fractional sloop balancing a high sail-area-to-displacement ratio with a spacious Ardizio interior
J Boats Tillotson Pearson J/4614.02 mSame hull family0.2 m longerA masthead sloop designed for offshore cruising, featuring a 1.89m draft and a balanced 10,886kg displacement
Xp 4413.88 mSame hull familyNear-identical lengthA 13.88-metre performance cruiser featuring a deep 2.3-metre bulb keel and a high 23.91 sail-area-to-displacement ratio
Bavaria Yachts 44 Vision13.70 mSame hull family0.2 m shorterA 13.7-metre fractional sloop with a high 23.82 sail-area-to-displacement ratio for responsive, spirited cruising
Hanse Yachts 46114.00 mSame hull familyNear-identical lengthA Judel-Vrolijk performance cruiser featuring a high sail area-to-displacement ratio for spirited sailing
Catalina Yachts Morgan 44014.00 mSame hull familyNear-identical lengthA 14-metre masthead sloop with a 1.5-metre wing keel, produced from 2004 to 2012 and later rebranded as the Catalina 440

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

Keep looking

Nothing filmed of this one yet

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