BoatsAstilleros del Sur M28.5

Astilleros del Sur M28.5

Fractional Sloop · Lifting Keel w/bulb; trans. Hung Rudder · First built 2014

A 2014 fractional sloop featuring a fixed bulb keel available in two draft options for performance-oriented cruising

Designed by Pablo Mastracchio.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Lifting Keel w/bulb; trans. Hung Rudder

Is it for you?

Character

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

Shoal draftDraws 1.20 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her light displacement on a beamy beam gives 15 — a quick, lively motion that feels every wave.

Comfort ratio 15
CoastalBluewater

2.22 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.22
LightHeavy

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

Displacement / length 136
EasygoingPowered-up

20.5 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.5
TenderStiff

38% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 38%

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

  • Heavier than ~76% of boats her size on file
  • Beamier than ~84% of boats her size on file

Compared with 566 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
38.0%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
20.5
Displacement / length
136.0
Comfort ratio
15.2
Capsize screening
2.22
Hull speed
6.9 kn
Pounds / inch immersion
920
Hull
Hull type
Lifting keel w/bulb; trans. hung rudder
Construction
Fiberglass
Ballast type
Iron
Production
Years built
First built 2014
Designer
Pablo Mastracchio
Builder
Astilleros del Sur, Zonda Yachts

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.

Maxus 26 (CB)8.40 mSame hull familyNear-identical lengthA 2015-launched fractional sloop with a 1.43-metre centerboard draft and a 19.61 sail-area-to-displacement ratio
Macgregor 26X7.87 mSame hull family0.6 m shorterA water-ballasted sail-power hybrid designed for versatile coastal cruising and easy trailering
Seaward Yachts 26RK8.66 mSame hull family0.2 m longerA fractional sloop with a 1.83m lifting bulb keel, offering deep-water performance in a trailerable 8.66m package
Catalina Yachts 227.26 mSame hull family1.2 m shorterA swing-keel masthead sloop with 15,000 units sold, offering a highly versatile and trailerable coastal cruiser
Redline 25 (C&C)7.49 mSame hull family1.0 m shorterA 1969 keel-centerboard cruiser designed by C&C, offering shoal-draft versatility in a compact 7.49-meter hull

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

Two ways to keep looking — both search what the fleet has actually recorded.

The newsletter

New boats, new stories, from everywhere.

One email from the fleet — boats newly added, videos newly analyzed. No noise.

Report an issue